A Microsoft file hosting and synchronization service.
Hello,
Looks like you are encountering challenges saving files using the Microsoft Upload Center. This issue is often caused by file or cache corruption. Since you already performed the steps to delete your Office document cache, we recommend that you uninstall and reinstall your Office application and see if the issue persists. Kindly use the Easy fix tool provided from this support article to: Uninstall Office from a PC.
Give us an update on the result and we will be glad to assist you further.