nubmodder

Hello, Apologies for the late response, I got the installer from the official site and no, I did not do anything with it. I just ran the file after it downloaded and it gives me the error

Relevant Details: I'm using an old laptop, HP Elitebook 2560p running on Windows 7 (This is the reason why I'm playing 1.16.5) I would like to add mods to my server hosted on aternos, But I can't get Forge to install on my laptop. When I execute the .jar file, The following error comes up: Could not find the main class: net.minecraftforge.installer.SimpleInstaller. Program will exit I tried googling my problem but I cannot find a solution to this. I hope this gets addressed. Thank you, Kind community!