Adobes cloud solution has nothing to do with OneDrive, so it´s not Adobes cloud sync that is the issue. They can both coexist. There may be issues if you try to sync the very same folders at the same time.
I had a similar issue with OneDrive, iow that it never finished to sync, and the solution for me was to uninstall OneDrive and then download the OneDrive installer from Microsoft and re-install it. This solved the issue for me. This will start OneDrive fresh, so if you have configured it such as moving the OneDrive folder from it´s default location you have to set it up again.
Click on the three dots to show Uninstall.
OneDrive and other sync solutions has caused issues with Premiere Pro, so the general advise is to have all your files in a folder that is not constantly monitored by the sync software. I use OneDrive but do only drop copies of the project file from time to time into one of my OneDrive folders.