3.0 upgrade success with fatal error

if you running the events plugin, try disabling it. https://core.trac.www.ads-software.com/ticket/13954

Have you tried:

– deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-specific problems?

Known 3.0 Issues: https://www.ads-software.com/support/topic/411649

I will try that. I have had problems with Event Calendar before. The beta version of the upgrade is broken. The dashboard is not working either.
As soon as I can reach my c-panel I’ll remove the plugins.

Deactivating all the plug-ins did work. Thanks. Reactivated one at a time after upgrade.
Just wish my upgrade from wpmu went as smooth as the 2.9x sites have.