org.geotools.styling.StyleFactory is not an ImageIO SPI class

I am using it in windows 10
python 3.6
jpy 0.9.0
SNAP 7.0
JAVA version 8 update 231
I used maven and VS to build jpy.
files in my python directory:
C:\Users<name>\anaconda3\Lib\site-packages\jpy.cp37-win_amd64.pyd
C:\Users<name>\anaconda3\Lib\site-packages\jpy-0.9.0.jar
C:\Users<name>\anaconda3\Lib\site-packages\jpyconfig.properties
C:\Users<name>\anaconda3\Lib\site-packages\jpyconfig.py
C:\Users<name>\anaconda3\Lib\site-packages\jpyutil.py
and pycache