Errors related to the installation process

[ichxorya]

Hello, my team is trying to install this repo in the Eclipse IDE. However, we encounter problems and would like to ask for help.

The first question is about the "cannot be resolved to a type" bug. There are many bugs of this kind, and we doubt there's some problem with the imported files (or could it be Xtext?).

The second question is about the "visualization" part. We couldn't install the mentioned visualization package in the wiki's guide (probably due to the repo's owner has privatized his Github). We doubt that maybe the lack of visualization part caused the inability to work with the remaining of this repo.

Thank you for reading this.