Pr - Motion Array Exporting Problem

I'm using Premiere Pro and I’ve been having trouble with a Motion Array template that's taking an unusually long time to render and export. It’s a 13-second project that includes 100 photos, and when I finally manage to export it, I get an error saying it can't be played in QuickTime Player. Has anyone else experienced this, or does anyone have suggestions on how to speed up the rendering/exporting process and troubleshoot the playback issue? Thanks!