Re: plugins not installing when running gails run-app
Looks like you are using JDK8 based on the Client VM warning. Grails 1.3.x predates Java 8. When JDK8 was released there were some issues identified with the version of Groovy that Grails 1.3.x uses and the JDK. You are going to need to use JDK 6 or 7 to work with Grails 1.3.x applications.