Try:
– switching to the default theme by renaming your current theme’s folder using FTP (or use whatever file management application your host provides)
– resetting the plugins folder by FTP or phpMyAdmin.
The issue is most likely the Events Calendar plugin.
http://wordpress.org/support/topic/411422?replies=5
@esmi: Thanks for the suggestion but I’m not sure how to do what you suggest.
@ nacin: if I get back in I’ll try disabling it.
Right now I don’t know how to get at the software 🙁
Just follow the guide that esmi linked to reset your plugins. Then, whatever you do, don’t reactivate the Events Calendar plugin.
@esmi (again): Finally managed to follow instructions and got the site back… many thanks!! 🙂
I’m just about to start the tedious process of working through the plugin directory changing *their* names (starting with calendar) and seeingwhich is the guilty party!!
I got the same error, did the plugin reset.
Got the Dashboard back, but not the site itself.
I just updated around 20 WordPress sites and this is the only one that is giving me this issue.
http://www.corpentertainment.net
*UPDATE*
The site didn’t like the new twenty-ten theme, which it defaulted to for some reason after upgrade. Switched back to custom theme and all is good.
So, never mind.