@IT Support ... screen shot shows nothing. Turn on debugging in Moodle all the way to highest? See anything then? Check web server logs for errors related. Without some technical info ... no one can give recommenations without 100% guessing. None here in these forums can perform a 'Vulcan Mind Meld' ( Ref: StarTrek).
Sorry but that leads to very long threads in forum, waisted time, etc., etc.
Also, we know moodle version but other details might also be important ... PHP version, DB server and version of DB. Where and how hosted? DIY or Shared or VPS ... with support without support, ... etc.