If you try going directly to Focal NA it may help you to have the driver part number handy. They are more likely to help you if they think you know what you are doing.
Double check and make sure it’s actually the driver. I’ve seen Focal crossovers break. The inductor had a hidden break near the PCB. If in doubt, switch the woofer and see if the problem remains with the crossover or if it moves with the driver.