File not compatible with quicktime player

Hi there ive been trying to export my premiere pro video but it saays it cant open on Quicktime media player. Ive tried exporting different ways H.264, H265 even quicktime and its still brings up the same mesaage. I cant even view it through things that arent Quicktime. Although ive been able to export footage from the same video in little snipets perfectly fine. Would you know how to solve it??

Thanks for your help!!