Incomplete Object error when updating site (after Drupal timeout) I (foolishly) tried to enable an installed module whilst on my shared hosting. The site times out, which isn't all together unsurprising. However now I get this error message whenever I try and make any updates to the site (enable any modules, clear cache, run cron etc.)

Any thoughts as to the cause. Here is the error in full.


  Fatal error: views_plugin_display::destroy(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition &quot;metatag_views_plugin_display_extender_metatags&quot; of the object you are trying to operate on was loaded before unserialize() gets called or provide a __autoload() function to load the class definition in /home/xxxxx/public_html/sites/all/modules/views/plugins/views_plugin_display.inc on line 272


If it makes any difference it was the Metatag module I was trying to enable.
I had this error when running update after disabling Metatag and Metatag: Views. It went away when I re-enabled those two modules. 

That also seems to have fixed some other issues I was having with the modules form; it would white screen on me after disabling (certain?) modules, although I could return to the Admin interface.