Got a bigger picture?
The unsafe thing here is the "electrician" (?) who did not tighten up the screws in the neutral bar. Only rapid way to detect that would be to fit a smoke detector in the box. Though that would be two more connection for him to mess up with.
This was in a garage of a new built house, so is about 15 months old.
The owner is going to contact the builders to try and have it replaced.
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