Hello,
It seems like no one know exact answer because I saw many unanswered questions related to this issue here.
Frequent recommendation is update, what you already tried how you wrote above.
- DAPLink (armmbed.github.io)
- FRDM-K66F Code not getting loaded - Mbed OS - Arm Mbed OS support forum
- frdm-k64f firmware upgrade - Question | Mbed
- Re: The interface firmware FAILED to reset/halt th… - NXP Community
If you will found a solution, please let us know.
BR, Jan