Hello Borgtex!
Thank you so much for your answer. I am relieved to know the error comes from the plugin and not from something I did! It appeared after WordPress 4 big update, you are right.
I tried editing the plugin code, and there is no change. You can look at a blog page here, it will show the same error code at the top of the post:
https://clemmoaroundtheworld.com/oreo-smoothie-by-clemmo
Should I wait and see if the changes appear after a while? I already deleted the cache.
Something called my attention though: in the editing section of the plugin, it says”inactive“. Is that something that could explain why changes are not being taken in account? How can I switch to “active“?—->
Edit Plugins
Editing baw-manual-related-posts/inc/bothend-noajax.inc.php (inactive)
Thank you so much for your help!
Clemmo