Over 2 minutes loading GUI app

Hey there!
I’m pretty new to IT (learning since september) and currently I’m working on battleship game with JAVAFX.
and when I try to run it it takes between 1 to 3 minutes (in most cases its sligthly above 2 minutes).
ALso the game crashes either during seting last ship or after first click on enemy board.

I also got outputs on console as can be seen below.

!

And stacktrace results in build succesfull…

Can anyone review this code and point out error?

Best regards

PS. I have to use javafx - that was requirement from bootcamp assingment.