Export-GCECalendarToCSV - Cannot bind argument to parameter 'Token' because it is an empty string

[rnliseb]

It seems that after it authenticates, it doesn't log in properly and errors with this

[gscales]

You need to know what happened during the Authentication process it probably got an error that it didn't expect or couldn't handle. If you run fiddler at the same time as you run the script and then look at what the actually Authentication response is that would help to tell what is going wrong as it could be one of the number of different things.