Unsupported Pin error when using pins on Port 1 of the nRF52840Dongle


I am using the nRF52840 dongle and am seeing problems when I try to use port 1 pins.

For instance, if I try to write to pin P1.01, 

gpio_pin_set(dev, 32, 1);

I see this error

ASSERTION FAIL [(cfg->port_pin_mask & (gpio_port_pins_t)(1UL << (pin))) != 0U] @ WEST_TOPDIR/zephyr/include/drivers/gpio.h:750
        Unsupported pin
[00:00:04.584,503] <err> os: r0/a1:  0x00000004  r1/a2:  0x000002ee  r2/a3:  0x00000001
[00:00:04.584,533] <err> os: r3/a4:  0x00013b0a r12/ip:  0x2000124c r14/lr:  0x000023c9
[00:00:04.584,533] <err> os:  xpsr:  0x61000000
[00:00:04.584,564] <err> os: Faulting instruction address (r15/pc): 0x00010570
[00:00:04.584,564] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:04.584,564] <err> os: Current thread: 0x200012e0 (unknown)
[00:00:04.635,345] <err> fatal_error: Resetting system

I seem to be able to write to pins on port 0, i.e. pins with a number less than 32 but unable to write above 32.

How do I enable this?