Minecraft Crashes upon loading?

[GamesExplosion]

What happens is, when I dint have any mods installed it opens fine but the moment I install one and run the game, it crashes. I looked at all the things that said this but it is all not for 1.16.2.

[Danebi]

Post logs/debug.log.

[GamesExplosion]

how do I debug.log ?

 

[Danebi]

It's a file named 'debug.log' in your 'logs' folder.

[GamesExplosion]

how do i post it then, i found the thing is it under right click or what do i do?

 

[Danebi]

Use pastebin or paste.gg.