Symptoms
The following error repeats multiple times in /var/log/panel.log whenever the server's license information is updated (for example, during the Daily Maintenance Task):
ERR [panel] Unable to get key: Repository is not opened
Cause
Corrupted /etc/sw/keys/registry.xml file.
Resolution
Regenerate the corrupted file:
1.Connect to the server via SSH
2.Remove the file:
#rm -f /etc/sw/keys/registry.xml
3.Regenerate it with Plesk repair tool:
#plesk repair fs -y