Hm, I just attempted to upload a screenshot I took and it uploaded fine:

I've attached the screenshot I successfully uploaded below, could you try downloading it and uploading it to your base?

If this works, it would indicate that you're able to upload files successfully via your computer/browser and that the issue is isolated to the files you're trying to upload
Hm, I just attempted to upload a screenshot I took and it uploaded fine:

I've attached the screenshot I successfully uploaded below, could you try downloading it and uploading it to your base?

If this works, it would indicate that you're able to upload files successfully via your computer/browser and that the issue is isolated to the files you're trying to upload
Thank you for your time. Yes it worked.