How I can fix this Exception?

I have coded a Test-method. Now I got this Exception you see below:

Unable to find component with id 'create' in [Page class = de.econsuite.wartung.webapp.pages.fragenanworten.FragenAntwortenDetailsPage, id = 1, render count = 1] Expected: ':create'. Found with similar names: ''

What I have to do now?

We are testing some code.