Hi Nick,
On Linode you install a native centos 7 and then run the script below to upgrade it ClearOS 7. As noted above, this time I did a yum update to the native centos 7 before starting to run the script line by line, not as a script. After doing the yum update to the native centos 7 server I was able to run each of the lines in the through the service webconfig stop. I tried to install the apps one at a time. app-accounts worked. When I executed yum again for app-configuration-backup it failed as noted above. Here is the script at Linode I am using: