When using the new Google Drive upload option, the file actually gets transferred to the folder OK, but Snagit just continues to sit and wait - eventually I have to quit the app and restart it to clear the issue.
I also get this problem. I am uploading a screen capture to Google Drive, it uploads, and there is a blue progress bar that fills up on top of the sharing icon (see attached screen shot)... it gets to what looks like 100%, but then it stays blue forever. All the sharing icons are greyed out and the only way to get it working again is to force quit the app. There is no error that I can see and the image is useable on google drive (ie the uploaded image is not broken)