Hi I have been struggling to fix this issue within all versions of after effects, what happens is I start after effects and once its on the screen where your ready to begin editing it closes by itself. it wont stop happening . I have uninstalled ae and creative cloud and I have also used the ae cc cleaner, nothing is working please help me:( and some times before closing it shows a premiere pro error even though I don't have premier pro installed.
Nobody can tell you anything without exact system info or other technical details such as crash logs or exact error messages. Sorry, but just saying that it closes on itself is not useful.
What OS are you using? What error messages do you get? What hardware do you have installed? What versions of AE have you tried?