It appears that your finder is misaligned, and that you lucked out on the focus with the 14mm eyepiece.

Try sweeping back and forth, while moving the scope up or down a bit for each sweep, until something appears. Then you can focus. I would then try sweeping up Polaris and adjusting the finder.

You could try a distant building in the daytime and adjust the finder on it. That should make it easier to find Polaris at night and make the final adjustment.