This is a known issue and Adobe is working on it
Workaround you can try:
**Close the application.
1. In the Finder, go to the Applications folder and select Adobe Indesign CC
2. Right click on the app file and Choose Show Package Contents from the Action menu.
3. Open MACOS
4. Go To Resources --> CEP--> extensions and move WhatsNew folder to desktop and delete from extensions.
5. Try to launch the application.