Hm, this is not an error message from the binding but from the framework. Did you remove the custom build from the addons folder? I’d try to remove the things from the inbox, uninstall the binding, remove the binding from the addons folder and install the binding from the central repository again.
If this doesn’t help, we need to dig deeper…
Edit: Seems like there are other bindings with similar issues: OH2 Kodi: No binding found that supports creating a thing of type kodi:kodi
Possible that you need to upgrade your OH2?