failed transmission

hi,
I have configured the traccar client for android to send data to my server. as you can see, the sending does not work.
what to do?
here is my configuration:

https://xxx.xx.net:5055

https://drive.google.com/file/d/1SeE9IsUU-BqFCxwULrH2fTtHq7S23XRt/view?usp=sharing
thanks

The problem is likely that you specified https instead of http.

hi,
sending always fails even with http
thanks

Have you followed troubleshooting guides?

hi,
no. where can i find this guide?
thanks

In the documentation.