Trying a different approach to this even though I was banned over Christmas,
What you are trying to do is take an addon that’s been specifically designed to work with the code and structure of a singe gamemode, DarkRP. As you may have known, DarkRP uses Sandbox to build off of in order to create BuildRP gamemodes with DarkRP. When you remove DarkRP and its specific structures and code, you are taking away an important part that the addon you are trying to install needs to run. If all goes well, you should be able to ask a Lua coder to remove the DarkRP specific parts and just keep the parts that allow it to run in something that uses Sandbox or just plain Sandbox.
Good luck and Merry Christmas :keke: