It is related to the Hostfile!
With a Hostfile that says "127.0.0.1 "
Traceback (most recent call last):
File “…\test.py”, line 8, in
server = create_server(app, host=“127.0.0.1”, port=desired_port)
File “…\Python38-32\lib\site-packages\waitress\server.py”, line 81, in create_server
last_serv = TcpWSGIServer(
File “…\Python38-32\lib\site-packages\waitress\server.py”, line 242, in init
self.server_name = self.get_server_name(self.effective_host)
File “…\Python38-32\lib\site-packages\waitress\server.py”, line 254, in get_server_name
raise ValueError(“Requires an IP to get the server name”)
ValueError: Requires an IP to get the server name
With a Blank hostfile
Serving on http://DESKTOP-…:59385
With a Hostfile with a site blocked
Serving on [site]:59786
It seems that Waitress may not be reading the hostfile properly. I wonder why it worked in 2.2.26?