So I just following Google Integration with Erpnext Documentation https://docs.erpnext.com/docs/user/manual/en/google_settings
Everything configured as well. I did integrate Calendar and Drive normally.
But when I integrate to Google Contact, (click on Authorize Google Contact Access) the site redirected to Erpnext login. Not to google authentication, as well as I integrate the Calendar and Drive. No error message displayed.
Let me know what should I fixed. I did search to this Disscuss Forum and found no hints. So I post it here, maybe it was a new problem (bug).
UPDATE: I found this error prompt when Authorize Google Contatct Access