'Gmail Integration' shows repeated Session Expired or Allow Deny warnings

This can be related to cookies and can be resolved by clearing the error and reauthenticating Gmail Integration with Salesforce and Gmail. 

To do this:

1. Clear all Cookies in Chrome since the beginning of time

1. Click the three vertically aligned dots in the upper right corner of your Chrome browser
2. Click Settings
3. Click Privacy and security in the left side of your browser
4. Click Clear browsing data
5. Choose All time in the Time Range
6. Click Clear data

For more information, see 'Clear cache & cookies' n the Google Help Site.

2. Follow the steps in Clear the Cache of Gmail Integration Chrome Extension to clear the Gmail Integration cache

Orgs with My Domain Enabled

If your org has My Domain enabled and configured make sure in the Setup | My Domain section you have selected the recommended settings for redirection 




 

After completing reauthentication Gmail Integration should load with no errors.