So I managed to install Studio 3.0 in Weblogic with no errors. I have created a new domain, set the setDomainEv file and installed the .ear file with the console of my domain.
The problem is now that when I login to Studio I get an empty page with no applications. When I run Studio in Tomcat I get a nice overview of my applications. Is there something wrong with my Studio environment in Weblogic?