This error is produced then wrong database logins supplied on working sites. This error issues 500 error and give's no clue what went wrong. It's very not user friendly because it's unclear what went wrong. At this case it should be better to show erorr that database logins are incorrect...

This error is produced on /lib/ezutils/classes/ezextension.php file 450 row. Calling $object = $reflection->newInstanceArgs( $handlerParams ); function with wrong database parameters...

Steps to reproduce

Change working site database logins to wrong ones.