ERROR: Invalid parameter detected in function (null). File: (null) Line: 0
ERROR: Expression: (null)

I can't offer a definitive answer, but one possibility is that a write to the slot directory's checkpoint file was in progress when the power failed. That could result in a startup crash if the program doesn't include a mechanism for handling corrupt/incomplete checkpoint files.

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"The ultimate test of a moral society is the kind of world that it leaves to its children." - Dietrich Bonhoeffer