My launcher keeps crashing (version 1.12.2)

When i click on "play" the launcher starts, but it goes back to the launcher and says

GAME CRASH
An unexpected issue occured and the game has crashed. We're sorry for the inconveinence.

I tried to find the crash report in the .minecraft folder but couldn't seem to find it. I even tried to get the log output but it just keeps saying "waiting for log output...." If you can help me i'll be really thankful i haven't played Minecraft since 5-6 months ago!

I'll get the log output when it comes up, right now i have to wait until it pops up.

One more thing, i think i accidently choose MCAPI instead of like Minecraft launcher, please ignore that.

BossGamer11