Downloaded server from https://www.curseforge.com/minecraft/modpacks/all-the-mods-7/files/3529597
SIMPLE-SERVER-FILES-0.0.32

Run the startserver.bat file then get an error saying : Not every host could be reached. Could be a problem with the internet.

It is definitely not a problem with the internet as I have no issue starting and running an enigmatica 6 server for testing.

I am using Windows 11 Home edition with 44GB of RAM installed and intel i5 10440 chip and nvidia GTX1660 Super video card.

Thanks for reporting this issue, however, ATM7 1.17 is no longer being supported by the team and will no longer get updates. If this issue is still happening in ATM7 1.18.1 please let us know in a new issue.