in plain english it mentions connectivity short circuit between the panels.
after sunset day put on insulated gloves and rubber sole shoes to visually inspect the Y connectors under the panels with bright flash light. you may find one or few with moisture dripping traces creating spark trigger disconnection.
specially those which are some how close to the ventilation spaces of panels over structure,, shall be re-done and pasted with motor-grade grease to repel moisture.
Please only do that after sunset at zero generation, for safety.