I upgraded WordPress/Event Espresso and now I get an error “item_name” required.

I upgraded WordPress/Event Espresso and now I get an error “item_name” required.

This error may happen when the Event Espresso module did not initialise correctly. In some cases the “*_event_attendee_cost” table was not created, causing the SQL that fetches the item_name to break. To solve this, you just need to deactivate, and then reactivate the Event Espresso plugin. This will reinitialise the plugin, and recreate the table. Other tables will remain untouched.