HTTPConnectionPool(host='http_proxy=<ip>, port=<port>): Max retries exceeded with url: <url>

Question

When I make requests.post, I get an error like this: "HTTPConnectionPool(host='http_proxy=, port=): Max retries exceeded with url: (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.HTTPConnection object at 0x00000246DDDB14B0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')))".

This problem occurred after adding the proxy. I removed the proxy, but interestingly the problem still persists. Can you help me?

Thanks.