Error on uDig SDK Quickstart

I went through the instructions in the SDK Quickstart tutorial step-by-step and used the components as specified above on the "Environment" field. It went through smoothly until the step to run the application, then I got the error (in the screenshot attached). You may notice in the Outline view (upper right of screenshot) that the two default dependencies have errors on them. I then tried to remove and re-add these dependencies (note that the udig_language-feature was not available and the udig-feature was of different version) and the app ran successfully.