This is a useless app! Crashing all the time

2 weeks of editing this video and only to find out I wouldn't be able to finalise this video. I have tried all the options including the 720p but it doesn't render the video and returns the error below.  Apart that, along the way, I have encountered several program crashes. I even reported the issue to Adobe just after an hour of paying for the subscription and never heard back from them to give me a refund.  

With the error below, I would have to redo all this -

Moderator note: Edited for content. Please abide by Adobe Community Guidelines and avoid profanity.