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Dec.06.2018

BLE Module Firmware Development Q&A: NFC pins creates “Error 404 – signal not found” (technically)

Although not too difficult to solve, it's a common error that most customers end up having on our modules and that is because Pin 0.09 & 0.10 are set to NFC per Nordic’s default settings. In order to be able to use these pins as normal GPIOs, you will have to change those settings.
The two pins I am talking about are the ones linked to the NFC-part to the far left in the circuit example below:
nRF52832 MDBT42V Schematic
So, to convert these two pins to normal GPIOs, here’s what you need to do:
In SES, you'll need to add CONFIG_NFCT_PINS_AS_GPIOS.
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Check out the link below for a reference example on Nordic's DevZone.
Reference link:Nordic DevZone - NFC pins into GPIOs