Failed to load any python extension

Hi! I have a problem with loading any python base extension in burp. I downloaded a jyton-standalone-2.7.0.jar and also configured python environment in extender options but when I want to install any python base extension via BApp Store I get error in the bottom right corrner "Failde to load BApp". I am using java in version - jdk-9.0.4 (burp is working fine). Does anyone know where the error may be?