Getting this uninformative message when trying to add entity to a Solution - in order to export the solution and import it into another environment.
Anyone know what this message means?
Solved! Go to Solution.
Follow up on this. For future reference - this may be a bug.
Because, I was allowed to add my entity to the solution if I did the followg.
Pick the entity, DO NOT check the Include all componets,
Instead click the "Select Componets" then when the window opens to show you all your fields, select them all, then next.
This allowed me to include the entity in my solution.