I kept getting this error when trying to edit the listing and save. I saw on another closed thread this is a known issue and suggested to create a common category.
Can we please elaborate a little more on the common category. I am using listinghive theme. Do I create a catgory under listing or standard wordpress page setting? Also, do I need to add anything to the form or php?
Please send more details that may help to detect or reproduce this issue (e.g. a link to your site, screenshots, a list of installed plugins, or the error message you get).