Ghost admin should not error if the currently active theme is missing.

[ErisDS]

If you try to start Ghost and access the admin panel when the currently active theme is not present in the content/themes directory, the following error is thrown

The admin panel should function 100% without a theme present, so that you can change theme to one that is present. This is a regression.

The frontend should show the error "The currently active theme casper is missing.", this also appears to have lost some styling.

Steps to Reproduce

1. Run Ghost at least once
2. Stop Ghost, remove the active theme
3. Start Ghost, try to access /ghost/ to change the theme

Technical details:

• Ghost Version: master

Any ideas how to fix this without updating ghost? I've deleted a theme after trying it out and now I can't get to the admin panel.

Edit: Nevermind, as a temporary workaround you can rename another theme folder to the folder you deleted.

[JamesJosephFinn]

Wow. You can't access the admin panel on a fresh install if you delete the casper directory?! I've even re-uploaded the entire casper directory that I deleted from the server, and the darn thing won't stop throwing 500.

Edit: after putting casper back, you must restart.