Some Ribbon buttons sudenly dissapeared from environment (from some Entities), and in Ribbon Workbench solution elements are not displayed and everything is greyed out (please see the image). I am Systemadmin in this environment. What could be the issue here?
I checked my security roles, I am still admin there. Cleared the cache, reloaded, problem persists.
Make sure the loaded solution does only contain the required entity and use the latest version of Ribbon Workbench:
https://www.xrmtoolbox.com/plugins/RibbonWorkbench2016/