We have just upgraded to version 3.3 and are having intermittent issues with some (not all) of the courses. Mainly in IE there is no option to add a resource or activity - the text is just black and no hyperlink? Some of them, as soon as you turn editing on, the course freezes and does not recover. Not as problematic in Firefox, however IE is the college default browser so really need to solve this issue. Can anyone help please?
Which version of I.E. are you using?
Have a read of... https://docs.moodle.org/dev/Moodle_3.3_release_notes#Browser_support
It says there are "compatibility issues" with IE 10 and earlier. Unfortunately, nobody seems to want to admit what those issues are.