ImageJ crashing

Hi, I just started using ImageJ and installed LUMoS Spectral Unmixing after I have downloaded ImageJ. It prompted to update several things and I did update all. I am unable to open ImageJ after the plugin is installed.

I have searched online and followed a site where they suggested to create a copy of the ImageJ application file and rename the copy to ‘debug’. So after the LUMOS plugin install; I have run the ‘debug’ application file as suggested and I see the following screen

Any suggestions fixing it will be helpful. Thank you.

The LUMoS Spectral Unmixing update site is currently non-functional, it breaks your current installation. The issue is documented here:

As a workaround (as discussed in the linked topic as well), you can download an older Fiji version bundled with the plugin, and avoid updating it.