For some time now, I have been able to change the primary category in the Classic Editor, but the change is no longer saved. If I switch to the Gutenberg block editor, the change is applied and after then displayed correctly in the Classic Editor. So, choosing the primary category only doesn’t work in the Classic Editor. I’m using the Disable Gutenberg plugin. Please help!
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We released a quick Beta update with a fix for the issue. You can wait for the stable version or follow these steps to enable beta updates on your site:
If you are unable to see an update, please clear Rank Math’s transients from: WP Dashboard > Rank Math > Status & Tools > Database Tools > Remove Rank Math Transients > Remove transients
Please clear the caches, server, and WordPress after updating.
You can disable the Beta updates once you update to the latest version and if the issue is fixed.