Installation links and instructions are in the first post in this topic:
I would strongly encourage you to use Hubitat Package Manager or the "Bundle" (ZIP file) installation method, eliminating both the tedious process of manually installing every app and driver file as well as the possibility of errors resulting from mistakes there.
If you already have devices added, I'd consider starting by just checking that you have the right app and driver files (and are up to date). If not, you can add a separate instance of CoCoHue and see if anything changes just to test--you don't need to remove the one you have to do that. Finally, if there are still problems, I would again need the requested log entries to troubleshoot.