Normally you have to create an acf-json folder inside your theme folder. There are the json files located.
Hi @dtkslc,
In my case there were conflicting json files, 2 files for the same field group. I deleted both & saved my field group. Then the problem was solved. (Don’t forget to backup everything if you try this)
We had a wrong copy of the json file, that conflicted with the actual file. After deleting the wrong copy and resaving the actual file, my problem was solved. Thanks.