you were correct:
Curl error: Failed to connect to 188.8.131.52: Permission denied >
My server has an "Outgoing Connections Manager" to protect against unauthorixed access.
I checked the ip in the broswer and it went to webassist.com
I allowed the above ip in the Outgoing Connections Manager and ran it again.
I got a different ip address error.
I repeated the process and I allowed it.
Next I got message was a connection.
When I ran Power CMS
It now accepted the activation number.