Hi,
we have noticed that some old clients having issues while connecting with the new version of Google sync. So this is the guide for those users who have been using Google sync version 3 to 5 and want to migrate version 6.
1. Open Google Sync Settings Tab
2. Now go to plugin files and inside inc/gs-api.php near line 18 see $debug = false;
3. Set it to $debug = true;
4. Refresh the page Google Sync setting page once opened in step 1.
5. Now again set back to code $debug = false;
6. Now you will be able to reset everything and start connecting your sheet.
Here are the video tutorials from this onward:
Connection setting: https://www.youtube.com/watch?v=7J2H92wfOus
More Getting Started Tutorial Watch: https://www.youtube.com/watch?v=pNdxG_otQ5c&t=0s