Cannot compile with Uno WiFi Rev 2

[ChuckBell]

Hi. I am getting compilation errors when compiling for the Uno WiFi Rev 2 board:

Printers.cpp:102:51: error: no matching function for call to 'printHex(Print&, uint8_t [4], unsigned int, const char [2], NULL)'
printHex(*p, header, sizeof(header), F(" "), NULL);
^
I had to change:

#include "HardwareSerial.h"

to

#include "api/HardwareSerial.h"

But then this error (and many more like it popped up). It appears like this is a problem with flash memory as something has changed with the Uno WiFi Rev 2.

Any suggestions?