As you can see the preview error says "Unreachable network file", you can't access the style_udnie.png image in the gmic.eu website.
https://gmic.eu/img/style_udnie.png
That is the image for Stylize/Picabia: Udnie
The uppermost 2 styles, custom style bottom or top layer do not require network connection, that's why they work.
I don't know how it works, tried to search if those style images are downloaded on the HDD, but did not find anything in the .gmic folder or temp.
Did you click the "update filters" button after installing 2.7.2? if you can update filters it would be strange that you couldn't use stylize.
Maybe you have so strong firewall setting that it prevents downloading the stylize filter images from gmic.eu?
Just guessing, cause I'm using Linux, no problems here Gimp 2.10.12 Gmic 2.7.2.
You're using portable if I'm right, so that might be the issue.