Since upgrading to 3.1 (and upgrading some plugins) my plugin page is empty) I can't delete or deactive them to troubleshoot
I've tried disabling some through cpanel by deleting them or moving them to a plugins/spare_plugins folder
The ones I've tried because I thought they could be part of the problem (because they are powerful and I have used them in the 24 hours prior to the problem) are:
YD network plugin managment
Multi-site tags (this was broken with new version upgrade, now mostly fixed)
Plugin management plugin.
These don't seem to have helped at all.