Attempted to load class net/minecraft/client/Minecraft for invalid dist DEDICATED_SERVER

[Jowy]

I am trying to host a dedicated server from my PC but none of my friends can join the server. It has been port forwarded already and the modpack I am using is ATM9 version 9-0.1.1.zip. There are a handful of errors like the title of this post, and I have tried other modpacks but they refuse to work. The modpack works on server hosting websites such as Host Havoc. 

part 1: https://pastebin.com/AAiq3MgU

part 2: https://pastebin.com/QAX9Yusm

[Sr.Victor]

Hello first of all open the ports of your PC
you must make sure that if your forge server is 1.20.1
all mods must be of the same version 1.20.1
make sure you install the dependencies for each mod.