parallel wont start

I click on it and it just bouncing and then I get a prompt to relaunch. I rebooted the mac and still the same. I removed it and going to reinstall but I was curious if anyone else has had this issue and or if this happens again what should I have done to find out the issue? Thanks

well reinstalled it and still will not let me open up parallel. What should I do to check this and figure out why