array_buffer_err

Error while loading '1569009476201-task1-keras-model/model.json'. TypeError: response.arrayBuffer is not a function
    at F:\Developer\meetups\node_modules\@tensorflow\tfjs-core\dist\io\weights_loader.js:97:90
    at Array.map (<anonymous>)
    at Object.<anonymous> (F:\Developer\meetups\node_modules\@tensorflow\tfjs-core\dist\io\weights_loader.js:97:48)
    at step (F:\Developer\meetups\node_modules\@tensorflow\tfjs-core\dist\io\weights_loader.js:48:23)
    at Object.next (F:\Developer\meetups\node_modules\@tensorflow\tfjs-core\dist\io\weights_loader.js:29:53)
    at fulfilled (F:\Developer\meetups\node_modules\@tensorflow\tfjs-core\dist\io\weights_loader.js:20:58)
    at process._tickCallback (internal/process/next_tick.js:68:7)