Why am I seeing this Access Denied error while Authenticating CloudExtend?

Solution for Error: Celigo CloudExtend Gmail for NetSuite-Apps Script "Has been denied access to your data"

Written by Chris Corcoran
Updated over a week ago

We started noticing this with a few customers recently and is an intermittent issue with Google .

Solution:
Retry authenticating again from Gmail Extension and that should complete the authentication process properly.