I haven’t seen V 8.2.1873 as in your post above ?, but sounds like the issue you are having is possibly to with Google changing to the new “People API”. See the following thread.
Gmail Contacts error - Mail - eM Client
Ps I’m currently using V 8.2.1509 for Windows which works fine with the new Google Contacts People. API using IMAP. You can get the latest release versions via the history page. https://www.emclient.com/release-history