I upgraded from 2.8.6 to 2.9.1
I also have a test site which is the same as the live site, did the same thing, didn't notice the problem and upgraded live, and now I have the same problem on both.
Symptoms are, if I do any of the following, I just get a blank screen. If I view source, there is none.
- Cannot login or logout, luckily I am permanently logged in on 1 machine
- If I do other operations, e.g. edit a page or post, use the editor to edit the code, once I click update, I get a blank screen. It has however updated the item in question, I use the back button to get back.
Refreshing does not help, I tried multiple browsers on multiple machines, clearing cacche does not help.
Can anyone help me resolve this?