warning in the "Delete old Files.." section after upgrading from Beta2 to Beta3

[Anped]

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Export all the family trees to GEDCOM files… Familien Pedersen
The family tree has been exported to Pedersen-2019-05-18.ged.
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Use of undefined constant WT_BASE_URL - assumed 'WT_BASE_URL' (this will throw an Error in a future version of PHP) …/app/Helpers/functions.php:159
#0 …/app/Helpers/functions.php(159): Fisharebest\Webtrees\Webtrees::Fisharebest\Webtrees{closure}(2, 'Use of undefine...', '/var/www/anders...', 159, Array)
#1 …/app/Http/Controllers/Admin/UpgradeController.php(356): route('control-panel')
#2 …/app/Http/Controllers/Admin/UpgradeController.php(191): Fisharebest\Webtrees\Http\Controllers\Admin\UpgradeController->wizardStepCleanup()
#3 [internal function]: Fisharebest\Webtrees\Http\Controllers\Admin\UpgradeController->step(Object(Nyholm\Psr7\ServerRequest), NULL)
#4 …/app/Application.php(45): ReflectionMethod->invoke(Object(Fisharebest\Webtrees\Http\Controllers\Admin\UpgradeController), Object(Nyholm\Psr7\ServerRequest), NULL)
#5 …/app/Http/Middleware/RequestRouter.php(68): Fisharebest\Webtrees\Application->dispatch(Object(Fisharebest\Webtrees\Http\Controllers\Admin\UpgradeController), 'step')
#6 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\RequestRouter->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#7 …/app/Http/Middleware/ModuleMiddleware.php(75): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#8 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\ModuleMiddleware->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#9 …/app/Http/Middleware/BootModules.php(58): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#10 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\BootModules->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#11 …/app/Http/Middleware/UseTransaction.php(44): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#12 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTransaction->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#13 …/app/Http/Middleware/CheckCsrf.php(63): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#14 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\CheckCsrf->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#15 …/app/Http/Middleware/DoHousekeeping.php(76): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#16 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\DoHousekeeping->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#17 …/app/Http/Middleware/UseTheme.php(70): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#18 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTheme->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#19 …/app/Http/Middleware/CheckForMaintenanceMode.php(49): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#20 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\CheckForMaintenanceMode->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#21 …/app/Http/Middleware/UseLocale.php(51): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#22 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseLocale->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#23 …/app/Http/Middleware/UseTree.php(59): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#24 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTree->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#25 …/app/Http/Middleware/UseSession.php(58): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#26 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseSession->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#27 …/app/Http/Middleware/UseFilesystem.php(49): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#28 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseFilesystem->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#29 …/app/Http/Middleware/UseCache.php(44): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#30 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseCache->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#31 …/app/Http/Middleware/UpdateDatabaseSchema.php(56): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#32 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UpdateDatabaseSchema->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#33 …/app/Http/Middleware/UseDebugbar.php(64): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#34 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseDebugbar->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#35 …/app/Http/Middleware/UseDatabase.php(85): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#36 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseDatabase->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#37 …/app/Http/Middleware/ReadConfigIni.php(62): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#38 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\ReadConfigIni->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#39 …/app/Http/Middleware/HandleExceptions.php(54): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#40 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\HandleExceptions->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#41 …/app/Http/Middleware/EmitResponse.php(52): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#42 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\EmitResponse->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#43 …/app/Http/Middleware/PhpEnvironment.php(46): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#44 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\PhpEnvironment->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#45 …/vendor/oscarotero/middleland/src/Dispatcher.php(118): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#46 …/index.php(40): Middleland\Dispatcher->dispatch(Object(Nyholm\Psr7\ServerRequest))
#47 {main}

[Anped]

When I go to my index.php side I get the following error:
Use of undefined constant WT_BASE_URL - assumed 'WT_BASE_URL' (this will throw an Error in a future version of PHP) …/app/Helpers/functions.php:159
#0 …/app/Helpers/functions.php(159): Fisharebest\Webtrees\Webtrees::Fisharebest\Webtrees{closure}(2, 'Use of undefine...', '/var/www/anders...', 159, Array)
#1 …/app/Http/Middleware/NoRouteFound.php(50): route('tree-page', Array)
#2 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\NoRouteFound->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#3 …/app/Http/Middleware/RequestRouter.php(59): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#4 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\RequestRouter->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#5 …/app/Http/Middleware/ModuleMiddleware.php(75): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#6 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\ModuleMiddleware->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#7 …/app/Http/Middleware/BootModules.php(58): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#8 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\BootModules->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#9 …/app/Http/Middleware/UseTransaction.php(44): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#10 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTransaction->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#11 …/app/Http/Middleware/CheckCsrf.php(63): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#12 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\CheckCsrf->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#13 …/app/Http/Middleware/DoHousekeeping.php(76): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#14 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\DoHousekeeping->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#15 …/app/Http/Middleware/UseTheme.php(70): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#16 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTheme->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#17 …/app/Http/Middleware/CheckForMaintenanceMode.php(49): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#18 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\CheckForMaintenanceMode->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#19 …/app/Http/Middleware/UseLocale.php(51): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#20 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseLocale->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#21 …/app/Http/Middleware/UseTree.php(59): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#22 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseTree->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#23 …/app/Http/Middleware/UseSession.php(58): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#24 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseSession->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#25 …/app/Http/Middleware/UseFilesystem.php(49): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#26 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseFilesystem->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#27 …/app/Http/Middleware/UseCache.php(44): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#28 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseCache->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#29 …/app/Http/Middleware/UpdateDatabaseSchema.php(56): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#30 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UpdateDatabaseSchema->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#31 …/app/Http/Middleware/UseDebugbar.php(64): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#32 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseDebugbar->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#33 …/app/Http/Middleware/UseDatabase.php(85): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#34 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\UseDatabase->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#35 …/app/Http/Middleware/ReadConfigIni.php(62): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#36 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\ReadConfigIni->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#37 …/app/Http/Middleware/HandleExceptions.php(54): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#38 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\HandleExceptions->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#39 …/app/Http/Middleware/EmitResponse.php(52): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#40 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\EmitResponse->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#41 …/app/Http/Middleware/PhpEnvironment.php(46): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#42 …/vendor/oscarotero/middleland/src/Dispatcher.php(136): Fisharebest\Webtrees\Http\Middleware\PhpEnvironment->process(Object(Nyholm\Psr7\ServerRequest), Object(Middleland\Dispatcher))
#43 …/vendor/oscarotero/middleland/src/Dispatcher.php(118): Middleland\Dispatcher->handle(Object(Nyholm\Psr7\ServerRequest))
#44 …/index.php(40): Middleland\Dispatcher->dispatch(Object(Nyholm\Psr7\ServerRequest))
#45 {main}

[Anped]

Using PHP Version 7.3.5

[fisharebest]

Use of undefined constant WT_BASE_URL - assumed 'WT_BASE_URL' (this will throw an Error in a future version of PHP) …/app/Helpers/functions.php:159

This error suggests that you still have the beta.2 version of this file (but have the beta.3 version of other files).

I suggest that you manually download/install the .ZIP file.

I can't imagine why you are missing this file (and other files?)

[Anped]

I used the update process in the control panel and then this happened.
By uploading new files I got my site up and running again.
Thanks.