Couldn't retrieve http://www.wppersian.com, and the only explanation I have is:

HTTP/1.1 400 Bad Request Connection: close Date: Sat, 28 Jan 2023 16:30:20 GMT Server: openresty/1.13.6.1 Content-Type: text/plan Client-Date: Sat, 28 Jan 2023 16:30:20 GMT Client-Peer: 198.58.118.167:80 Client-Response-Num: 1 Client-Transfer-Encoding: chunked Invalid Request