By placing text in a layout , I received this message
Fatal error: Call to a member function create() on a non-object in C:\xampp\htdocs\xibo\lib\Controller\Module.php on line 420
thanks for reporting that - we’ve already got that logged as a bug here: https://github.com/xibosignage/xibo/issues/823
You can turn off inherit permissions in the CMS settings as a temporary workaround - or you can apply the files listed in the commit attached to the bug report. Sorry for the inconvenience.