Patrick Andrew Hartnett 

Have tried multiple different plugins both private and public. Has there been any change to Trados 2022 that is modifying RibbonGroup API?

Example Community Plugin I even tried: Sdl-Community/WordCloudRibbonGroup.cs at ebfe90a70d07289128cd75e73f579dad3f00247c · RWS/Sdl-Community (github.com)

If I try to compile this, install, and launch Trados 2022, I end up with the same error everytime. Even starting a new, blank template with the most basic setup for configuring a RibbonGroup yields this error, despite clearly inheriting from the required Abstract class.

Very basic example, which still results in error:

using Sdl.Desktop.IntegrationApi;
using Sdl.Desktop.IntegrationApi.Extensions;
using Sdl.TranslationStudioAutomation.IntegrationApi.Presentation.DefaultLocations;

namespace Sdl.Actions.Sample
{
  [RibbonGroup("MySampleRibbonGroup")]
  [RibbonGroupLayout(LocationByType = typeof(TranslationStudioDefaultRibbonTabs.HomeRibbonTabLocation))]
  class MySampleRibbonGroup : AbstractRibbonGroup
    {
    }
}