I’ve experienced problems with my WordPress Tag Cloud whilst the Event Calender Pro is enabled. If I click a tag, the archive shows empty and no results are available. When I deactivated the Event Calender Pro plugin, the tag cloud works correctly.
I believe the following code snippet should correct this issue. Generally the easiest way to apply this fix would be to add it to your current theme’s functions.php file. Snippet: https://gist.github.com/jazbek/7442734
Our developers are integrating a permanent fix in an upcoming release. For now though that snippet should correct everything.
Please let me know if that worked for you. Thanks!