My OS wasn't doing this earlier in the day and I can't figure out the fix.

After having messed around with the subscription manager and disabling and enabling some software repositories, I now get this error whenever I try to update my computer running the newest download of RHEL 8.3. Below is the out put i get when updating/upgrading.

Errors during downloading metadata for repository 'rhel-8-for-x86_64-appstream-rpms':
- Status code: 404 for https://cdn.redhat.com/content/dist/rhel8/x.y/x86_64/appstream/os/repodata/repomd.xml (IP: 23.63.150.83)
Error: Failed to download metadata for repo 'rhel-8-for-x86_64-appstream-rpms': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

Could someone please give me some direction in fixing this? I though I had it fixed earlier in the day as it was updating/upgrading fine. I had done some 'subscription-manager' commands and it seemed to fix it but i must have done something else to make my system basically useless to me at this point. This is scaring me away from RHEL. Please help. Thanks.