Error: Unable to get folders list! Probably wrong credentials passed!
Check your credentials, settings and spelling. If these are correct go to this address:
https://myaccount.google.com/u/1/security
myaccount.google.com
Google Security settings
And follow this pathway to change your security settings. Your connection from Salesorder to your email will still be secure. Less secure in this context, means you are not using dual authentication.