Use led matrix 8 x 32

Hi
Sorry for bad english
I hawe problem to use a led matrix 8 x 32 with Arduino Uno
I use this code:

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

#define MAX_DEVICES 4
#define CLK_PIN 11
#define DATA_PIN 12
#define CS_PIN 10

MD_Parola P = MD_Parola(DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

void setup(void) {
P.begin();
P.print(“PPPPPPPP”);
}

void loop(void) {
}

I have included libraries MD_Parola.h e MD_MAX72xx.h

Compiling the program I have this error:

In file included from Led_31.ino:1:0:
C:\Users\Portatile\Documents\Arduino\libraries\MD_Parola-master\src/MD_Parola.h: In member function ‘MD_MAX72XX::fontType_t* MD_Parola::getFont(uint8_t)’:
C:\Users\Portatile\Documents\Arduino\libraries\MD_Parola-master\src/MD_Parola.h:1814:116: error: ‘nullptr’ was not declared in this scope
inline MD_MAX72XX::fontType_t* getFont(uint8_t z) { if (z < _numZones) return (_Z[z].getZoneFont()); else return(nullptr); };
^
Led_31.ino: At global scope:
Led_31:11: error: invalid conversion from ‘int’ to ‘MD_MAX72XX::moduleType_t’ [-fpermissive]
In file included from Led_31.ino:1:0:
C:\Users\Portatile\Documents\Arduino\libraries\MD_Parola-master\src/MD_Parola.h:1117:3: error: initializing argument 1 of ‘MD_Parola::MD_Parola(MD_MAX72XX::moduleType_t, uint8_t, uint8_t, uint8_t, uint8_t)’ [-fpermissive]

MD_Parola(MD_MAX72XX::moduleType_t mod, uint8_t dataPin, uint8_t clkPin, uint8_t csPin, uint8_t numDevices = 1);
^
invalid conversion from ‘int’ to ‘MD_MAX72XX::moduleType_t’ [-fpermissive]

Why?

Thanks