I’m not using K2. I just upgraded from 2.3.1 to 2.6 and I’m getting this error on register_sidebar() and when I comment that out, it changes to wp_register_sidebar_widget().
I can access the other pages of the admin if I navigate to them manually. It seems that everything else works except for the dashboard. I guess since there’s a workaround, it’s not that big a deal, but I’d like to have it fully functioning.
I deactivated all plugins before upgrading, and the plugin manager still shows them all as not active.
Any ideas?