Blank Error Message on Adding REST service

[yakima]

I created a project and in SoapUI NG (Ready!API) with REST services and done some coding and it all worked fine.

I saved the project.

Today when I enter the project, I cannot access some of the GET services I created. Clicking on the Request, it doesn't open the Request Editor for me.

When I try to add the service as a new service, I also get a blank Error Message.

What am I doing wrong?

See attachments.

[yakima]

However, when I creating a new project with the same URI, it imports correctly.

[JKambli]

Please check if there are any duplicate Interfaces, resources or methods. Since that will break the request.