This system does not have a valid entitlement for Red Hat Network

السلام عليكم ورحمة الله وبركاته

بعض الأحيان ربما بسبب عدم تجديد ترخيص توزيعتك RHEL مع شركة Redhat تسبب ظهور مثل هذه الرسالة عندما تحاول تعمل تحديث:

RHN support will be disabled.

Error Message:
Service not enabled for system profile: “server”
Error Class Code: 31
Error Class Info:
This system does not have a valid entitlement for Red Hat Network.
Please visit https://rhn.redhat.com/rhn/systems/SystemEntitlements.do
or login at https://rhn.redhat.com, and from the “Your RHN” tab,
select “Subscription Management” to enable RHN service for this system.
Explanation:
An error has occurred while processing your request. If this problem
persists please enter a bug report at bugzilla.redhat.com.
If you choose to submit the bug report, please be sure to include
details of what you were trying to do when this error occurred and
details on how to reproduce this problem.

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