Prime won’t charge, “plug in charging system malfunction” message on screen

2022 Prius Prime XLE

I was having issues with the circuit breaker the charger (Level 2 charger) is connected to needing to be reset after I plugged it in. This had been happening for a few days (but would charge normally after being reset), and now it won’t charge at all and the message “Plug in charging system malfunction, visit your dealer” comes up on the screen.

Is there anything I should try before taking it to the dealer?

Also, does anyone know if the plug in charging system would be covered under warranty? The agreement states that “hybrid systems” are covered to 100k miles, but it specifically mentions the traction battery and doesn’t mention the plug in system. My bumper to bumper coverage just expired.

Thanks!