How to fix cURL cannot communicate with license server ?

[WSNHosting]

cURL cannot communicate with license server https://ka.plesk.com:5224/xmlrpc (195.214.233.80): Timeout was reached(28)
cURL cannot communicate with license server https://ka.plesk.com:5224/xmlrpc (2001:67c:730::80): Couldn't connect to server(7)

i use linux

thankyou

 

[Alvin_Allen]

Try the troubleshooting techniques identified in this KB: https://kb.plesk.com/en/808