Dear Kenneth,
Thank you for contacting us.
With regards to the issue you have reported, there are two potential resolutions :
1. The ResMania extension for Joomla (or for Drupal) that you are using is out of date. Simply download the latest version from your account dahboard (=> you need to log in, on resmania.com, then locate the "Downloads" section on your dahboard, and click on the "Go..." button).
2. Or you simply need to clear the ResMania cache, as per these insructions :
docs.resmania.com/index.php?title=Proble...g_the_ResMania_Cache
I hope it helps! Don't hesitate to let us know how you get on with it!
Warm regards,
Laly