Photos missing from iCloud.com

I have had non-stop issues trying to export photos from my Photos app on my Mac, so that I have a backup on an external drive. So I tried to go see them on icloud.com to check they were there and try exporting directly, but they aren't in the Travel photo like they are in my Photos app (they do seem to appear to still be in the main "Photos" library though, just not seperated into the folder allocated).

I am freaking out because I don't qualify for Apple support, I can't even update my Mac because there isn't enough storage for the new iOS ( I can't gain any storage until I clear the photos) and I'm terrified of losing all my photos. PLEASE. Help. I've uploaded as much information in the photos I think you could need to help me.

Photos should be in the highlight "Travel" album but it's empty.

The 'Preferences' settings in my Photos app on Mac.

Some of the error messages I get when I try to export the files.