Yes, this is the complete error in the GUI. See also the attached screenshot.
The error appears with different file types, including as a .jpeg (2MB), an .exe (58MB) and an MP4 (94MB) file. I copied these to my (local) My Drive folder, and Insync tries to upload them to Google Drive and then the error occurs.
I will send the log files to logs (logs.db, out.txt) to support@insynchq.com.
I also just updated to the New Insync version: 3.0.28, but the errors remain.