Unable to use the Projects pages with IE11

Unable to use the Projects pages with IE11

After testing our Zoho access on a number of devices and browsers, I have come to the conclusion that the issue is with the IE browser. The Projects pages work fine with Edge and Chrome (laptop and android phone). I have tried IE11 on three separate devices and the behavior is the same. The Issues link (on the left hand side) does nothing. The screens don't have the fields on them that I'm expecting and even links to "Sign Out" and "Contact Support" from the my profile link in the top right corner don't do anything.

Anyone else have this issue please?