Cannot read property 'bias' of undefined neuralnetwork.js:366:58 when runing fn fromJSON with server Hapi

If I running single my script to recognition a charecter then Neral Network skip layer input, but if require it from server Hapi error occur at line: 366, 367. And I resolved it: this.biases[i][j] = layer[node] ? layer[node].bias : 0; this.weights[i][j] = layer[node] ? _(layer[node].weights).toArray() : 0;