I would appreciate a lot help on this. After I tried to edit a "single page" (Elementor) the draws content from Advanced Custom Fields field, I started getting this error :
It turned out the problem is linked to the plugin ACF:
.
I tried disabling it. When I did, the error disappeared, but I started getting a new one!
Many thanks in advanced for the help. I am not a developer and the issue seems too complex for my level of expertise.
Mourad