Unable to access KernelCare extension after its installation: The KernelCare extension has been successfully installed. Please allow up to 5 minutes for all components to be fully configured

Symptoms

Unable to access KernelCare extension after its installation in Plesk > Extensions > My Extensions > KernelCare > Open, the message below is shown forever:

The KernelCare extension has been successfully installed. Please allow up to 5 minutes for all components to be fully configured. This page will be automatically refreshed when configuration is complete.

Cause

Issue on the KernelCare side

Resolution

1. Log into the server via SSH.
2. Remove /opt/psa/var/modules/kernelcare-plesk/installing.lock and /usr/local/psa/var/modules/kernelcare-plesk/installing.lock files:

   # rm /opt/psa/var/modules/kernelcare-plesk/installing.lock

   # rm /usr/local/psa/var/modules/kernelcare-plesk/installing.lock

3.  Re-install the KernelCare extension by executing the following commands:

   # plesk bin extension -u kernelcare-plesk

   # plesk bin extension -i kernelcare-plesk