Dear Adeling,
Sorry for the inconvenience the issue caused in your environment.
As the upload issue in your environment may be involved with some logs and further investigated by our related team, I suggest you contact the administrator in your company and open a support ticket to our related team as soon as possible so that they can help you further.
Sorry for that our category may have limited resources to contact our related team directly.
Thanks for your understanding and hope that the issue in your environment can be fixed soon by our related team.
Cliff