How to run a webserver through GPRS using ESP32

[lg007]

[x ] I have read the Troubleshooting section of the ReadMe

What type of issues is this?

[ ] Request to support a new module

[ ] Bug or problem compiling the library
[ ] Bug or issue with library functionality (ie, sending data over TCP/IP)
[x ] Question or request for help

What are you working with?

Modem: SIM800L
Main processor board: ESP32
TinyGSM version: 0.11.7
Code:

Scenario, steps to reproduce

I have a SIM card with a private APN. I would like to setup a webserver on port 80 through GPRS using the ESP32 (this webserver would be accesible only from those other endpoints that are within the private APN).
I have tried the simple webserver library for ESP32 and also the ESPAsyncWebSrv. Unfortunatelly both crashed after issuing the server.begin() command. Of course before starting the webserver I also waited until the gprs connection was started. Could anyone give me some hints on what am I doing wrong?
(This setup works well with other GRPS endpoints that run linux, like a raspberry with a SIM800L modem, so there is no problem with the APN setup)