There is few information so I will assume you have a KMS capable MCU and KMS image was not erase. And right COM port was selected.
In this case, I suppose you have and old image, not supported in KMS1.2 and you need to update it. After communication fail screen, go to Project menu and Select Load Application Image.
I took at your company's website. Some interesting products and more coming it seems.
One thing that could be useful from NXP enablement is the implementation of a multi-motor FOC control with the KV46. We just announced KMS support for the KV46 but we don't yet have samples available for it other than ones I can create on my bench. Also no one has implemented dual motor control with KMS. It's possible but it has not been done yet.
There is few information so I will assume you have a KMS capable MCU and KMS image was not erase. And right COM port was selected.
In this case, I suppose you have and old image, not supported in KMS1.2 and you need to update it. After communication fail screen, go to Project menu and Select Load Application Image.