Coqtail will not start server

[CTHULHU-Jesus]

I get this error when I do CoqStart. I don't know why.

Error detected while processing function coqtail#start[6]..coqtail#init[2]..provider#python3#Call: line 18: Error invoking 'python_eval' on channel 3 (python3-script-host): error caught in request handler 'python_eval ['CoqtailServer.start_server(bool(0))']': Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/pynvim/plugin/script_host.py", line 167, in python_eval return eval(expr, self.module.__dict__) File "<string>", line 1, in <module> File "/home/haster/.vim/plugged/Coqtail/python/coqtail.py", line 949, in start_server CoqtailServer.serv = ThreadingTCPServer(("localhost", 0), CoqtailHandler) File "/usr/lib/python3.8/socketserver.py", line 452, in __init__ self.server_bind() File "/usr/lib/python3.8/socketserver.py", line 466, in server_bind self.socket.bind(self.server_address) OSError: [Errno 99] Cannot assign requested address Press ENTER or type command to continue

My version of coq
$coqtop --version The Coq Proof Assistant, version 8.11.0 (March 2020) compiled on Mar 5 2020 20:37:30 with OCaml 4.08.1

version of python= 3.8.10

[CTHULHU-Jesus]

I had the line 127.0.0.1 *.localhost for a different project.
After adding the line 127.0.0.1 localhost It works again. I was the problem.