Please help. I imported a custom field from an old site to my new one. It worked initially but now any time I try to edit the field it just says "Loading Fields, please wait..." and then goes blank. I have made many of the following attempts to get it to work:
1. Deactivated all other plugins
2. Cleared the site, field, and browser cache.
3. Ensured that max_input_vars = 10000;
4. Modified the import file with the following attempts:
a. deleting some of the lower priority fields
b. renamed the post_title & post_name
c. renaming all of the field 'id' values