Aldoraz

I installed what I think is Java 8 and now it works as intended, thanks everyone for their help

So Java 8 - Java 15 or Java 8 Update 15? Java's naming system really confuses me.

Can't insert the picture, so here's the link https://imgur.com/a/utiByu8

OK, thank you, but well, same problem exists with the 1.16.5 forge.jar

So I downloaded a Feed The Beast Forge Server (FTB Presents Direwolf20 1.12 Version ID: 2051 to be exact) directly from the official website but I can't open the forge-1.12.2-14.23.5.2855.jar I tried the usual solutions like reinstalling, tried Java 8, which worked for another person, then installed the newest version of Java, but I still can't open the forge.jar https://imgur.com/a/mYfSOTF This shows both my server files and the error code I get when trying to open the forge.jar using cmd. I hope somebody can help me out. Thanks in advance.