Rendering error

Hi I am completely new to Fusion 7 and I have made a simple looking animation featuring a png background and some text made within fusion 7 however when it comes to rendering I'm having problems. Whenever I hit the green render button I have no error messages such as branches not being connected but when i hit render it seems to do everything fine an then it comes up and says: render did not complete, and then I get a message about UHD formatting only being available in black magic studio.

my output format is currently QuickTime Movies this is because I obviously need it to play as a video. I have also tried AVI and some others.

Any help with this would be massively appreciated.