My game wont let me join public servers! Why?

the rom has nothing to do with connection but the main problems as far as I know is
Russia blocks CoopNet
VPN blocks CoopNet
your internet is blocking connection to CoopNet (or banned but I highly doubt it)

And what can I do to fix that internet thing?

Me paso lo mismo todo el tiempo me dio una respuesta que tal vez te ayude ami no porque solo funciona en pc y soy de Android

I got smth similiar that happened to me and it wasn't the internet. But it brought to the "my files" app when it couldn't read it. I clicked "Super Mario 64 (USA).z64" aka "baserom.z64" and the game worked because it read the file. Also u gotta put that .z64 file in the user folder in the built in sm64coopdx folder.

SuperThumbinio said:

Me volví algo similar a lo que me pasó y no fue Internet. Pero llegó a la aplicación "mis archivos" cuando no pudo leerlo. Hice clic en "Super Mario 64 (USA).z64", también conocido como "baserom.z64", y el juego funcionó porque leía el archivo. También debes colocar ese archivo.z64 en la carpeta del usuario en la carpeta sm64coopdx integrada.

Click to expand...

How do I do it?

So your gonna wanted rename your "super mario 64.z64" file to "baserom.z64" (if you want) and move it to the user folder in the built in sm64coopdx folder. Then ur gonna wanna open sm64coopdx and then u must wait till the game sends u to "my files" app. Once there, you must look for the baserom.z64 file and click it. Once clicked, the game will read the file and use it and now you can play thr game.