Describe the bug

A friend and I have been trying to play FTB Oceanblock together through minetogether. but regardless of who hosts, the minetogether server never shows.

Steps to reproduce

I've been following the guide shown here.

Expected behaviour

The server is supposed to be showing in the multiplayer section of minecraft's main menu.

Screenshots

No response

Version

Unsure

Minecraft Version

1.16

ModLoader Version

FTB (Forge)

Additional Information

No response