There could be a few possibilities for this error code:
Possible Cause: The license is fully utilized, and no available Workspot license is available.
Possible Solution: If you are a BYOC customer, increase the license from Control > Profile > Subscription. For other licensing models, please reach out to your Workspot Account manager.
Possible Cause: The user is attempting to launch a desktop from a pool that has no available desktops in the "Ready" state.
Possible Solution: Ensure that no desktops in the pool are in an error or failed state. If all desktops are currently assigned to end-users, consider adding more desktops to the pool.
Possible Cause: For Enterprise Customers, a user can access non-persistent desktops and Cloud Apps; however, they get an error while accessing Persistent desktops.
Possible Solution: Ensure the user is part of the Named Users License group.