Registration of the new server in Parallels Panel Server Manager fails with this error:
Unable to install Mobile API extension: Unable to Connect to tcp://autoinstall.plesk.com:80. Error #0:php\_network\_getaddresses: getaddrinfo failed: Temporary failure in name resolution
Parallels Panel Server Manager requires the Parallels Panel Mobile Center extension to be installed on the server. If it is not installed, Parallels Panel Server Manager automatically downloads it from the Parallels repository (autoinstall.plesk.com) and installs it on the server. This error means that it is not possible to establish a connection to the Parallels repository.
Make sure that it is possible to connect to the Parallels repository, autoinstall.plesk.com, from the server with Parallels Plesk Panel installed.
# curl http://autoinstall.plesk.com
Alternatively, you can manually download the Parallels Panel Mobile Center extension and install it on the Parallels Plesk Panel server.