Www.googleadservices.com’s server IP address could not be found

The error message "www.googleadservices.com’s server IP address could not be found" is given when clicking on Google generated ads after a search. It occurs when VPN is turned on, but the link works with VPN off.  The same happens with Chrome and Firefox.

Why have a VPN if it has to be turned off  for Google searches?

This has been reported for a long time now and no solution other than turning off VPN has been offered.

An example which reports this error with VPN on is:

https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwif-OyBkd38AhVNxJYKHceNAL0YABAJGgJ0bA&ase=2&ohost=www.google.com&cid=CAASJORoBjEQy2SLM6SfGYVOjMuva-LADSAALkzXynAlvZmxTbzarg&sig=AOD64_39WGq9dPcJH9i8w5ql1s2pmfgm0g&ctype=5&q=&ved=2ahUKEwiyzOaBkd38AhXfsFYBHX3rBmsQ9aACKAB6BAgDEAw&adurl=