An error occurred while loading navigation: user is not allowed to do action [listDatabases] on [admin.]

Dear Support,
I was able to connect to Atlas yesterday. Today I get the error
An error occurred while loading navigation: user is not allowed to do action [listDatabases] on [admin.]

The setting seems to be fine as per the training instructions. What could be the issue?

Is this class cluster or your sandbox cluster?
How did you connect(command with options used)
May be the user does not have privs to readwrite other DBs if this is your sandbox cluster

This is Sandbox cluster. The issue got resolved on its own after I restarted the Windows laptop couple of time so it was my laptop memory issue (Windows8.1 6GB RAM) . What I realized is that since I installed MondoDb on Windows, it starts the server service in the background (even when u are not working on MongoDB) and consumes a lot of memory, leading to Windows memory related error. I have ow removed MongoDB from path and I only add it when I am working on MongoDb. Thanks for your inputs.