I just started using the library and even the examples don't work

[dokasto]

I'm running this

 const gpu = new GPU();
        const multiplyMatrix = gpu
        .createKernel(function (a, b) {
          let sum = 0;
          for (let i = 0; i < 512; i++) {
            sum += a[this.thread.y][i] * b[i][this.thread.x];
          }
          return sum;
        })
        .setOutput([512, 512]);
        
         const c = multiplyMatrix(5, 10);
          console.log("c", c);

and getting this

gpu-browser.min.js:14 Uncaught (in promise) Error: Error compiling fragment shader: ERROR: 0:461: 'user_aSize' : undeclared identifier
ERROR: 0:461: 'user_aDim' : undeclared identifier
ERROR: 0:461: 'getMemoryOptimized32' : no matching overloaded function found
ERROR: 0:461: 'user_bSize' : undeclared identifier
ERROR: 0:461: 'user_bDim' : undeclared identifier
ERROR: 0:461: 'getMemoryOptimized32' : no matching overloaded function found
�
    at WebGL2Kernel.build (gpu-browser.min.js:14:303531)
    at WebGL2Kernel.t (gpu-browser.min.js:14:383403)
    at r (gpu-browser.min.js:14:383730)
    at processPixels ((index):306:21)
    at drawToCanvas ((index):392:43)