[Appointments+] Appointments+ conflict with in-house google drive plugin

Hello,

We were hoping we could get some help with something. We have an in-house developed plugin that leverages the Google Drive API and it appears to break the Appointments+ Google Calendar integration with the following fatal error:
Fatal error: Call to undefined method Google_Client::getClassConfig() in /home/cabox/workspace/wp-content/plugins/appointments/includes/external/google/Logger/Abstract.php on line 126

I've spent hours going through the code and searching for people that have experienced something similar with not a lot of help, I was wondering if we could have your expert advice on code suggestions since you all have much more experience on things such as this.

WP version 4.9.5
PHP 5.5.9
Support access has been granted

Greatly appreciative of your help, we love your plugins and are happy to be a member. Would like to get this conflict resolved, thank you.