Status webhook verification is failed

I’ve used a library of python which is equal of localtunnel but wrapped in python flask-localtunnel · PyPI

127.0.0.1 - - [25/Sep/2022 23:18:43] "POST /callback HTTP/1.1" 404 -
127.0.0.1 - - [25/Sep/2022 23:18:54] "POST /callback HTTP/1.1" 404 -
127.0.0.1 - - [25/Sep/2022 23:19:15] "POST /callback HTTP/1.1" 404 -
127.0.0.1 - - [25/Sep/2022 23:19:55] "POST /callback HTTP/1.1" 404 -