Application "crowd-embedded" does not allow adding of groups

Hello, all
I am not sure if this category is the right one I post a question.

I installed a new crucible server (evaluation) and tried to add a group under “Security Settings”>Groups. Here is what I got a response:
Error creating group. Application “crowd-embedded” does not allow adding of groups. Please check the system logs for details.

Can you please tell me how to fix it?
Thanks much
Troy