A bug of BSDFviewer on Linux

I installed successfully the BSDFViewer on my Windows 11 subsystem Linux and also I can run it successfully, but it display abnormal. The button “Load a BSDF xml file” was hidden, and the layout of interface was a bit disorder. Below is the screenshot of interface. Thus, I can’t click the button “Load a BSDF xml file” to visualize the bsdf.