How to solve "File system daemon has not been started correctly" error?

When trying to set a different Sandbox using the RTC shell, we often get the following error message:
CRRTC8500E: Server Error: Failed to set current sandbox to "<Sandbox_2>"
Exception type:
com.ibm.team.foundation.service.RestTransportException
Exception message:
File system daemon for <Sandbox_1> has not been started correctly
Once this starts happening, we have to restart the computer to be able to set a different sandbox.
The same errors pops up when trying to refresh or unset the current Sandbox.
Question: when this error happens, is there a way to set another sandbox without restarting the computer?
Using RTC 6.0.1
One answer

I am not sure why this exception occurs and probably the log will give more information about the exception.