Hi @ajp,
Thanks for using Zoom SDK. As mentioned in the repo: https://github.com/zoom/zoom-sdk-ionic, the Ionic SDK is developed and configured only for the Ionic Angular projects and we have not tested with other environments, such as pure cordova. The Ionic SDK is also using the ionic-native as the bridge wrapper so if this wrapper is missing, then it could run into errors while trying to initialize the SDK.
I will forward this to the engineering team and see if we could decouple the dependency on the Ionic framework in the future.
Thanks!