For some reason I was suddenly getting a message saying CRM uses lots of scripts and I need to add the CRM website to my trusted zones.
This is the error message
I have no idea why this suddenly started appearing but when I added the url to the trusted sites it still didn’t work.
Interestingly this happened also for my CRM 4 links and I had to add the url to the trusted sites as well. So you definitely have to do both parts to get it working.