The update of Parallels Panel has failed: “Syntax error in file panel.inf3: Error parsing Element”
The issue is temporary and caused by network connectivity issue to one of the autoinstaller mirrors.
As a workaround use another autoinstaller mirror, add the following IP addresses for autoinstall-win.pp.parallels.com to the hosts file:
126.96.36.199 US, Kansas
188.8.131.52 US, California
184.108.40.206 US, California
220.127.116.11 EU, United Kingdom
18.104.22.168 EU, Germany