Cannot get my e paper to work

Hello, I'm also trying this e paper display, after I send the demo code to pico, and run save(), the display doesn't work, and with some error:

save()
=undefined
Erasing Flash.....
Writing.............
Compressed 81600 bytes to 10333
Checking...
Done!
Uncaught Error: Invalid BPP
at line 1 col 118
...Y,this.display.bpp,{msb:!0});b.clear=­function(a){(new Uint8A...
in function "grfx" called from line 1 col 364
....powerPin;this.g=this.grfx();this.csb­TimeOut=a.clearScreenTi...
in function "b" called from line 1 col 8
new b(a)
in function "connect" called from line 16 col 4
});
in function called from system

here is the code

// per default turn display off
digitalWrite(A7, LOW);
// run following code onInit
E.on('init', function() {
  // SPI configuration
  var spi = SPI1;
  spi.setup({
    mosi: B5,
    sck:  B3
  });
  // create display instance
  var display = require('SSD1606').connect({
    displayType: 'GDE021A1',
     spi        : spi,
      cs1Pin     : B6,
      dcPin      : B7,
      resetPin   : A5,
      busyPin    : A8,
      bs1Pin     : A6,
      powerPin   : A7
  });
  // activate the power to run the display, just a comfort function, 
  // you can control the power by yourself as well
  display.on();
  display.hwReset(function(){
    display.init(
      function(err){
        // (optional) fill the internal buffer for all pixels with color white, 
        // without this the default color will be black
        display.g.clear(0xFF);
        // not optional - rotate the display x and y coordinates 90 degrees to the right
        display.g.setRotation(1);
        // from here it shows the normal usage
        // set color black for subsequent uses
        display.g.setColor(0x00);
        // set fontsize, see Graphics and Fonts modules for further options
        display.g.setFontVector(20);
        display.g.drawString('Hello World!', 22, 22);
        // from here it shows the needed part
        // (needed) copy internal buffer to display buffer
        display.g.flip();
        // run the display update
        display.refreshScreen(function(err){
          // do whatever you like here, e.g. turn it off when the update is done
          // again just a comfort function
          display.off();
        });
      },
      // clearScreenColor is optional, but prevents e-paper ghosting
      // shadow of an image may be visible after refreshing (only) parts of the screen
      { clearScreenColor: 0x00 }
    );
  });
});

My firmware got updated.

Anyone can help? Please :)

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