I got the following error message when I used page https://welcome.adblockplus.org/en/inst ... 0.4472.101 to try to pay you. Sorry that the error message doesn't contain any useful information.
You don't have permission to access "http://www.paypal.com/cgi-bin/webscr" on this server.
Env: Windows 10 Home, Chrome 91.0 (64), ABP 3.11