So, I got this problem. I've recorded bout 2 hours of footage, and I want to make it into a cinematic video. But whenever I try to add a keyframe, regardless of whether its position or time keyframe, this bar pops up, saying "Loading entity positions: 0%". And it gets stuck, I've left it for over an hour at one point and the loading was still at 0%. I can't turn it off, nothing works, although I can move mouse, but thats pretty much it. Any ideas on how to solve it?
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https://postimg.org/image/owq6unnrf/