The Modal as a component plnkr linked from the guide doesn’t work when you click the button. It throws the exception:
Error in src/modal-component.html:3:47 caused by: No component factory found for NgbdModalContent
I’m actually getting the same error in my own code, not experienced enough with Angular2 yet to be able to figure out how to fix it.
Version of Angular, ng-bootstrap, and Bootstrap: