Issue with Tag Pages

3.2 version has a problem with tag pages, showing a PHP error message:

Warning: Illegal offset type in isset or empty in /home/wp-includes/post.php on line 1060

When I activate the plugin, my tag page do not show any posts. If I deactivate the plugin, my tag page works fine.

The only tag pages that work are Events tag pages.

Any idea to fix that problem? Thanks in advance.

https://www.ads-software.com/plugins/the-events-calendar/