There is a more stable and current mod that I suggest you use here: https://minecraft.curseforge.com/projects/stargate-network
This is an un-official port of the mod Greg's SG Craft.
Stargate Atlantiscraft provides some technology based loosely on the television show Stargate Atlantis. Stargates allow instant travel over long distances or between dimensions. They may be used on their own, or optionally powered by IC2 or Thermal Expansion energy and controlled by computers from Computercraft or Open Computers.
Report issues for this version ONLY. I only support 1.12.2
The license and original mods can be found below:
The mod was compiled against these dependencies , it is recommended that you have these in the mods directory but is still optional:
ComputerCraft-1.80pr1-build5.jar or latest CC tweaked
OpenComputers-MC1.12.2-1.7.2.71.jar
industrialcraft-2-2.8.81-ex112.jar
The above mods are only optional but are recommended.
The latest version of forge 1.12.2 and Optifine (if you have it) is also recommended.