Class "App" not found Error

Documentation API
Error in: ROOT/src/Controller/PgroupsController.php, line 2
Warning (2): Function must be enabled in php.ini by setting 'xdebug.mode' to 'develop' [APP/Template/Error/error500.ctp, line 33]

If you want to customize this error message, create src/Template/Error/error500.ctp

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