Problem uploading jpegs from a Mac to iCloud
I have been successfully uploading about 4000 jpeg files to the iCloud website. This has stopped working and I get the error message "Uploading folders isn't supported. Only files in JPEG format can be uploaded".
On the surface this makes no sense to me. The jpeg files were stored in folders on the Mac but they were copied and pasted into the iCloud website. I can't even copy and paste, or drag and drop a single jpeg to the iCloud website now. Any thoughts. would be appreciated please.
iMac