Please update your PBX to version 2.1.0-6 to fix this issue.
If you want to know more about the changes on the version 2.1.0-6, please visit the following link: https://vitalpbx.org/en/vitalpbx-2-1-0/
The latest changes are at bottom of the blog.
If not updates are found, you will need to clean the yum cache:
yum clean all
rm -rf /var/cache/yum/
