Tag and category pages show no results

Hi
I recently moved over to The Next Mag theme and everything was going well until I realised there may be was some sort of a conflict with the templates.
However, I cannot get the pages working for individual tags or categories.
The closest I could find to maybe resolving it was using…
remove_filter( ‘template_include’, [‘AnsPress_Theme’, ‘anspress_basepage_template’], 9999 );
This at least loaded a page the title ARCHIVES and them the word “Tags” below but no results.
Has anyone else had this issue or know of a workaround? I really want to stick with this theme and need to get this working asap.
Thanks in advance.