Authentication with Google failed - GCalendar HELP

Hi,

Do you mean I should try to use the Google generated App Password?

Hi,
Here is the defination of 2nd Authentication password from Google:
2-Step Verification adds an extra layer of security to your Google Account, drastically reducing the chances of having the personal information in your account stolen. To break into an account with 2-Step Verification, bad guys would not only have to know your username and password, they'd also have to get a hold of your phone.
For more details, please spend time to read documentation of OS Services Booking. You will find solution to register Google 2nd Authentication password easily.
Thanks
Dam

Hi,

I followed the manual but still had the issue. I ended up creating a whole new Google account with a gmail.com domain and this solved the issue. Thanks.

That's great, Congratulation!
Dam