SOLVED: MKV files arbitrarily not playing

[devvphil]

Code:

[hls @ 0x563199c629c0] Failed to open segment 'bdfdcc2962cb3c8f489bbb63c10fc24f-1.mp4'
[out#0/hls @ 0x563199d65480] Could not write header (incorrect codec parameters ?): Permission denied

Do you have permissions to write to the directory that you mounted /cache?

Yes. It should have full access to any folder it wants since other files work just fine.

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Code:

[hls @ 0x563199c629c0] Failed to open segment 'bdfdcc2962cb3c8f489bbb63c10fc24f-1.mp4'
[out#0/hls @ 0x563199d65480] Could not write header (incorrect codec parameters ?): Permission denied

Do you have permissions to write to the directory that you mounted /cache?

Well then. I think i probably fucked up some folder creation stuff?
I just set the cache folder the same as the config folder, seemingly no issues for the most part.
But now I tried adding a seperate cache folder and referred to that.
now it just works???