It seems like a javascript conflict with your theme or any other active plugin. Need to check it in your installation to find the issue. If you want us to check, please post here https://www.wpdownloadmanager.com/support/forum/download-manager-free/
I already posted there, but support is dried out over there:
here the post:
https://www.wpdownloadmanager.com/support/topic/wordpress-tag-listing-doesnt-work-anymore/#post-58442
When I deactivate the loader in my theme, i can see the tags listing. Same is if I deactivate download manager, then i can see the tag listings as well.
Any ideas what to do? You can post here or on the topic on your website. I will check them both regulary…
I have the same problem on my site.
After some googling i found a possible hint:
“this often happens when a theme or plugin has an incorrectly targeted pre_get_posts action. the query modifications intended for the main query are also applied to the query for menu items, causing no items to be returned”
(https://wordpress.stackexchange.com/questions/124574/menu-disappears-on-category-pages)
So i searched the Plugin for “pre_get_posts”, found it in “class.Apply.php” line 34, commented out, menu works.
I don’t know yet, if this will call new/other issues plus the next Plugin-Update will overwrite this change – so quiet a bad solution.
Maybe you can fix the issue with this hint?
We will fix the tag archive issue in next update of Download Manager. The update is coming soon.