Can’t export – Slideshow Master - MV maker Review

I like what I’ve created but every time I try saving it to my phone or try to export it to another app, the app crashes! Everytime. I even paid the upgrade... It would say ‘rendering...’ for 20 seconds then crashes It’s useless if I cannot send it or use it on a computer. Please help
Review by YesusSaves on Slideshow Master - MV maker.