Error creating a new Watch Group.
Adding a new Watch Group, creating a new Watch Item, then immediately adding it to the newly created group when prompted, causes the WebWatchBot service to error.
An error occurs.
Stop the WebWatchBot service, add a new Watch Group, start the WebWatchBot service.
This issue will be resolved in the next maintenance release, v4.0.6.
Resolved in v4.0.6