Hi,
Unfortunately I still have this problem. But maybe short descpription of this waht happen after instaling new update will help. before that I need to mention something… After discovering the issue I downgrade the plugin to previosu version(2.1.7) to have neded functionality.
So today I update the plugin to V2.2.1. After instaling the update everything was working fine. Next I go to widgets and open settings tab of the Google Calendar Events Widget. Everything was looking fine, all settings looks like they should. I pressed “save” button and check it again. From this moment plugin start to saying that there is no upcoming events.