Hi, I'm Robinson, and I’m happy to help you today.
I know how frustrating this may be for you but I'll do my very best to help you.
Are you using the OneDrive from the browser? There are specific situations when OneDrive displays an Error code 102 messages.
-You were browsing certain OneDrive files in your browser on a Windows computer.
-You have put your PC into hibernation without closing the OneDrive window of your browser.
-You started your PC with a different Internet connection or the ISP changed the IP address of your Internet connection.
It's recommended that you use the OneDrive app when you upload a large folder, using the app you can continue the upload where it left off.
At this link, you can see how to set the OneDrive app.