I was using Thunderbird 68.8.0 and my contacts sync with Google has stopped working. There are 2800 contacts on the Google comic and Thunderbird displays and syncs only approx. 800 I decided to reinstall the program and, as usual, downloaded the latest version, Thunderbird 78. Now the trouble has started, The new program does not synchronize contacts at all and its address book is a failure. In addition, after removing and installing Thunderbird 68, the automatic update to version 78 took place after a few days. I guess I'll have to switch back to Outlook after many years. Or maybe you will help and fix the dud that is Thunderbird 78?

Sorry for my english, it's google