Drupal 7 installation

[cruxklee]

I get this error when installing it to drupal version 7.56 on development server xampp with php version 7.1.10 and jquery update module 2.1.4

Fatal error: Uncaught Error: Unsupported operand types in C:\xampp\htdocs\enter\includes\theme.inc:637 Stack trace: #0 C:\xampp\htdocs\enter\includes\theme.inc(689): _theme_process_registry(Array, 'bootstrap_parag...', 'module', 'bootstrap_parag...', 'sites/all/modul...') #1 C:\xampp\htdocs\enter\includes\theme.inc(325): _theme_build_registry(Object(stdClass), Array, 'phptemplate') #2 C:\xampp\htdocs\enter\includes\theme.inc(277): _theme_load_registry(Object(stdClass), Array, 'phptemplate') #3 C:\xampp\htdocs\enter\includes\theme.inc(411): theme_get_registry() #4 C:\xampp\htdocs\enter\includes\theme.inc(395): ThemeRegistry->initializeRegistry() #5 C:\xampp\htdocs\enter\includes\theme.inc(335): ThemeRegistry->__construct('theme_registry:...', 'cache') #6 C:\xampp\htdocs\enter\includes\theme.inc(277): _theme_load_registry(Object(stdClass), Array, 'phptemplate', false) #7 C:\xampp\htdocs\enter\includes\theme.inc(1020): theme_get_registry(false) #8 C:\xampp\htdocs\enter\includes\errors.inc(254): theme('maintenance_pag...', Ar in C:\xampp\htdocs\enter\includes\theme.inc on line 637