Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject

Issue

When updating or remounting cagefs, the following error can be seen:

Updating users ...** (pkttyagent:2338834): WARNING **: 07:02:33.674: Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject
Error registering authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject (polkit-error-quark, 0)
Updating statuses of users ...** (pkttyagent:2338869): WARNING **: 07:02:35.006: Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject
Error registering authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject (polkit-error-quark, 0)

Environment

• CageFS
• Polkit

Solution

Clean yum cache and update polkit package

yum clean all
yum update polkit

If it did not help, refer to RedHat KB article https://access.redhat.com/solutions/5005111