I have the aio installed and created custom post types which support tags.
The tags are showing up and I can assign them.
But in the taxonomy URL, all posts created in CPT are not showing up.
How can I fix this problem?
The website has got over a hundred tags...
It looks like you assign the default taxonomy post_tag of WordPress to the CPT development but the Oxygen builder template does not support displaying multiple post types on the taxonomy archive page. You can try to contact Oxygen support to ask for help with this case.