If you've upgraded to DNN 5.5.0 and use either Aggregator or Module Rotator, then you'll need to login to your account and download the latest versions. If you don't have an active membership, to download these versions you'll need to visit the store and purchase a membership first.

There were quite a few schema changes in DNN 5.5.0 due to the new localization features which caused a few problems with Aggregator and Module Rotator. I tested all the modules in the DNN 5.5.0 Beta back in July so that you'd be able to upgrade as soon as DNN 5.5.0 went live.