Hi Kerry,
So sorry for the trouble here! Let’s try to figure this out together and get things back to where they should. 🙂
First off, are you able to log into your account on this site and download the latest versions of The Events Calendar PRO and Filter Bar from My Account > Downloads? If so, please do that and follow this guide to manually install the latest versions of those plugins.
Once the new versions are installed and activated, please check back in with me to let me know if that makes a difference in the “The following plugins are out of date” error message you’re seeing.
If it does, then we will move on to the other error message you noted:
503 ( Invalid Key ): Sorry, your access to this file has expired. Please contact Tribe PRO Support for assistance.
Let’s start here and see what we find.
Thanks!
Geoff