OAuth token exchange blocked — roadblock error on Canada DC account

OAuth token exchange blocked — roadblock error on Canada DC account

My account info@compressotech.com on Canada DC returns a roadblock page when exchanging a Self Client authorization code at accounts.zohocloud.ca/oauth/v2/token. Client ID: 1000.TYHVYKAKAY8YQ5P44KT2PUD8H6057A. Please unblock the OAuth access.