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@absurdbird
Does the crank spider have a shoulder on the inside to support the chainring or is it a singlespeed crank?
The chainring bolts are missing -that is the cause of the problem. They may have worked loose because the ring was moving as it was unsupported in the inner position, or they may have fallen out because they were incorrectly fitted.
No amount of bad chain line is going to cause the bolts to drop out. If you moved the chainring into the inner position and there are no shoulders to support it its doubly user error.
You need a shorter BB to get correct chain line