Unable to upload any file to the Cloud

you can upload those files types only to your sync folder.  libraries etc are for special document types created by cc apps.

btw, the sync folder will no longer be supported soon.

for enterprise and teams, https://helpx.adobe.com/enterprise/kb/eol-cc-synced-files-for-business-plans.html

for individual subscribers, https://helpx.adobe.com/creative-cloud/kb/eol-creative-cloud-synced-files.html

Syncing files is not the problem, that works as intended. Uploading to the cloud is where the error occurs. I am unable to upload any type of file to the cloud, regardless of what I try. Do you have any ideas for how to fix that issue?

browswer and local file system/sync folder are the two ways.

eg, use your os file browser to drag a bitmap to your local sync folder.

Thanks for responding.

What do you mean by assets site? I have tried uploading on my browser from my local files and sync folder as well as uploading on my desktop app from local files and sync folder. Is there any other way I can try to upload a file?

are you using your local sync folder to upload?

if not, and you're using your browser to upload, use your assets site.