whenever i click play the launcher closes after loading a little bit then i wait for minecraft to open it doesn't then the launcher reopens and has a crash report

so as the subject reads whenever i click play the launcher closes after loading a little bit then i wait for minecraft to open it doesn't then the launcher reopens and has a crash report but when i check the crash reports there is no new ones and when i click view crash report it doesn't let me so yeah i hope you can help me also my minecraft used to work just in case you think i'm new i tried uninstalling it and installing it nothing happen.