Why the DM? I'm having the same issue trying to add my Google Storage account to the "CloudBerry Explorer for Google Storage PRO" application. I updated the application to make certain that I was using the latest version. I checked the Google account settings to ensure that "Less secure app access" is turned on (just in case). We also use CloudBerry Backup Server Edition, and that ("CloudBerry Backup") is listed in the "Apps with access to your account" section of my Google account settings.

So, what is the "secret sauce" that can't be shared in these forums? What am I missing? How do I give ColudBerry Explorer the appropriate permissions to access my Google Storage account?