I just re-tested the hidden category field and it seems to work normally on default WordPress. That means that for your setup, either something is interfering (like another plugin or theme) or there is misconfiguration somewhere.
Based on your description, I am guessing that you entered the category name, instead of the category ID? If you read carefully the setting calls for an ID, not a name. So that would be the first thing to check.
Thank you for your reply! You’re correct, I entered the category name. Where do I find the category ID?
Tons of tutorials about this, for example:
https://www.google.com/search?q=how+to+find+category+id+in+wordpress
I hope that helps, let me know if I can provide any further infos.
Thank you!
Just out of curiosity: why don’t you use the category name? It would make it much easier for the user.
You’re welcome!
Will consider using category name instead of ID, thanks.
I used to be a usability guy at my last job. I’m always looking for ease of use.
Here’s the WP function get_cat_ID( string $cat_name )
Thanks again!
Hey looking closer at this, it’s possible to get the category ID by hovering over the category name in the plugin settings. It was there all along!
