An ArrayMerge error message started popping up on some of the product categories etc.
This is discouraging to users, and I turned off error messages in Joomla admin except these still appear.
Warning: array_merge(): Expected parameter 2 to be an array, null given in /mnt/data/vhosts/casite-
Is there a way to disable this, or fix it.
I have already tried refreshing the cache etc. Alongside reindexing. It is not that.