Error: failed to retrieve repodata/filelists.xml.gz from {repository_name}

Symptoms

Trying to provision packages in the EasyApache 4 interface may lead to this error:

Error: failed to retrieve repodata/filelists.xml.gz from base/7/x86_64

Description 

This error occurs when there's an issue contacting the repository, or if the yum cache is corrupted.

Workaround

Update the yum cache with the following two commands to make sure it has accurate data without errors:

yum clean all

yum makecache