minecraft wont launch. can make/join worlds but right away go's back to launcher page after i click the join world/make new world options

the game wont launch

What I expected to happen was...:
join/make new world and play

What actually happened was...:
when back to launcher screen when i clicker join/make world option

Steps to Reproduce:
1.launch minecraft
2.click single player
3.click join word/ create new world option