Looks like you did not use the release 0.0.4 version of the wknd tutorial, but used the un-released master-branch of the wknd-tutorial (in the screenshot I see the version number 0.0.5-SNAPSHOT). But according to the documentation this release is targeting AEM as a Cloud Service as "primary" version.
But the documentation also says, that if you want to use it on AEM 6.x (and not Cloud Service), you should use this command:
Sometime back I also used WKND sample project on 6.5.5 but didn't found any such issue. Below steps I followed to setup WKND on 6.5.5 1. Installed SP5 over 6.5 2. Installed latest ACS Commons package. 3. Deployed AEM WKND Project.