Issue/Error Message when Calling LabVIEW VI in Vision Builder

I was running LabVIEW 2015 SP1 and Vision Builder 2015, and I was trying to call a LabVIEW VI in Vision Builder. However, I got the error message that others have gotten, "The VI is broken or one of its subVIs is broken or cannot be found". I have already followed everything here: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000ozWkCAI&l=en-US. I called the same VI in the llb again, but I had the same error message. I was wondering what else I can try to resolve this, and I greatly appreciate any help or idea. Thank you!