There appears to be different issues depending on which browser I use. I tried updating a couple of fields using Edge and it worked, BUT Edge isn't prepopulating the password fields which means that when you hit the Update button, it's wiping the password. I've noticed that there are a few users in the database where the password is blank so this is happening to others as well. I re-input the password and it saves it OK. Then when I go back to Chrome, the info I've updated appears for an instant but then it immediately changes back to the previous info! I assume this is a cookie issue in Chrome, however even after clearing the cookies it's still happening. I'm going to keep testing and will also run CCleaner to see if that sorts things out, but could you maybe see if this is also happening for you?
**UPDATE** I ran CCleaner, restarted and tried again and sure enough the form is now working in Chrome. However, I still have the same issue with Edge not pre-filling the current password value, which means that if you update without adding this in it will remove the password. Same issue in Firefox.