Conver2rhel fails with the 'failure: repodata/repomd.xml from rhel-7-server-rpms: [Errno 256] No more mirrors to try.' ?

Issue

• Convert2rhelfails with the below error:

     One of the configured repositories failed (Red Hat Enterprise Linux 7 Server (RPMs)),
     and yum doesn't have enough cached data to continue. At this point the only
     safe thing yum can do is fail. There are a few ways to work "fix" this:
  
       1. Contact the upstream for the repository and get them to fix the problem.
  
       2. Reconfigure the baseurl/etc. for the repository, to point to a working
          upstream. This is most often useful if you are using a newer
          distribution release than is supported by the repository (and the
          packages for the previous distribution release still work).
  
       3. Run the command with the repository temporarily disabled
              yum --disablerepo=rhel-7-server-rpms ...
  
       4. Disable the repository permanently, so yum won't use it by default. Yum
          will then just ignore the repository until you permanently enable it
          again or use --enablerepo for temporary usage:
  
              yum-config-manager --disable rhel-7-server-rpms
          or
              subscription-manager repos --disable=rhel-7-server-rpms
  
       5. Configure the failing repository to be skipped, if it is unavailable.
          Note that yum will try to contact the repo. when it runs most commands,
          so will have to try and fail each time (and thus. yum will be be much
          slower). If it is a very temporary problem though, this is often a nice
          compromise:
  
              yum-config-manager --save --setopt=rhel-7-server-rpms.skip_if_unavailable=true
  
     failure: repodata/repomd.xml from rhel-7-server-rpms: [Errno 256] No more mirrors to try.
     https://cdn.redhat.com/content/dist/rhel/server/7/8.10/x86_64/os/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found