Multiwii Software I

Good day everyone, I know this is not the multiwii forum, but I decided to seek help here because this forum seems to be very active compared to the multiwii forum, and I also had some problems creating an account. Anyway I am making an Arduino based drone based on the Arduino pro mini, Nrf24l01, and the mpu6050.I have tested all the components and they work fine but the problem is when ever I open the multiwii GUI, the app crashes. Did I mention I have installed java (JDK 11). Any help will be very much appreciated.

As I don't know multiwii at all, no suggestetions there.
However, posting the code is a minimum.
Read and look for how to post code here: How to get the best out of this forum - Using Arduino / Introductory Tutorials - Arduino Forum