CC: NextGen Gallery plugin
My site is a multisite. I have just updated WP and plugins that needed updates.
After that, the frontend showed a blanck page with the error message:
Fatal error: Call to undefined method stdClass::add_query_var() in /homez.744/vivartan/www/wp-includes/taxonomy.php on line 356
I then tested desactivating/reactivating each plugin. This showed me that the problem occurs only when NGG and Jonradio are both activated. When only one of them is activated, all works well.
Note: The problem occured already after I updated NGG, but before I updated Jonradio. So I guess the cause is more on NGG side.
Once Jonradio updated as well, problem still occurs.
The problem occurs also when using WP default theme.
Thanks in advance