Help with chrome cast audio plugin

I am very new to this forum. My squeezebox duet just died. I was using ipeng to control the squeezebox. I also have a readyNas Duo V1, which runs the iTunes (firefly) server.

I purchased the Chromecast audio and replaced the squeezebox. This works fine with the google home app. Now I want to be able to also play my music library on the readyNAS.

I installed the chrome cast plugin on the readyNAS, but it keeps crashing and restarting according to the log. The settings under the chrome cast plugin states that the Configuration file missing - create one by clicking "generate" or, if autosave is on, refresh this page. Tried this without any luck.

Please help!