SangomaConnect " Server error Invalid access token From ip: 104.131.76.244"

When attempting to invite a user to the mobile app (Admin → User Management → Edit User → SangomaConnect → ‘Send SangomaConnect Mobile App Invitation Email’) we are consistently getting the following error:
Invalid access token From ip: 104.131.76.244

I’ve added the IP to the Firewall’s whitelist hoping this would make a difference but no such luck. Any ideas on how to address this issue?

FIXED: After running all module and system updates, then uninstalled and reinstalling the SangomaConnect module, the ‘invalid access token’ error is no longer being presented after sending the mobile app invitation email.