bruh. just download the mod "viaforge" for minecraft 1.12.2, and put it in your mods folder, then launch minecraft in forge 1.12.2 and inject vape, then it should be ok
vape v4 works on lunar and badlion client, just choose "1.8.9" as version (1.8 on lunar client)
+ vape v4 works on 1.16.5, just choose minecraft forge 1.12.2 with the mod "viaforge" to be able to join 1.16-1.17 servers.