Hello, I'm still pretty new to Minecraft mod-ing,
I downloaded the required Gecko mod as well- that mod worked fine solo without CNB added into my mod folder so I know its an issue with the CNB file not properly connecting/registering. When I load up my forge java edition game with the CNB 1.19.2 version it displays an error/ exit code for crashing.
I'd appreciate the time taken for a response- I'm excited to try out this mod when it can work for me it looks amazing!

• I also checked the config folder due to the other reports I reviewed listed, and I'm pretty sure there isnt a config file for the CNB (to be honest, I'm to new to tell if I just didn't notice the files name under config but none was close to CNB I had my forge configs in there and one for fml.toml

I figured it out while looking at downloading your other mod! I had downloaded the required gecko mod with a different installer plugin (I only was aware of forge and fabric as download options off of forge)
I just ensured it was the forge file of the version I needed, If you run into the same issue just double check that its the correct file and you see the Gecko mod listed in your Minecraft's 'mods' section after starting the app!