Troubles with FFmpeg Library

I’m having troubles with my FFmpeg Library. I’ve used it to export multiple channels off of .mov’s and .mp4’s within the past week, and now all of a sudden I’m getting this message. I’ve tried located the library (which Audacity has confirmed is still there) Reinstalling both the Library and Audacity, and it’s still not able to import my files. I’m not sure if this is a new problem, but it has come up very all of a sudden.
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