Problem started occuring when I updated to Joomla 3.9.1 and JEM ver 2.2.3, can't save or edit events or cancel out of the edit screen. Using chrome tools I get Cannot read property 'task' of null at Object.e.submitform...at Object.e.submitbutton...at HtmlButton Element.onclick any ideas how to fix this? I need to get new events added and edit existing ones
Does the problem occur in frontend or backend?
Which template do you use?
Did you try to delete your browser's cache and load a new version of the page into your cache (CTRL+F5 or SHIFT+F5)?
It would be good if you copy the whole error message e.g. with line numbers if they are shown in your browser's console
I tested with the newest version of Joomla (3.9.2).