Need urgent help regarding rhino and vray

Hi all, I’ve been using rhino and vray both on trial versions for school however I recently had to reinstall my vray. Upon doing so, when I try to start up rhino I am always greeted with a message ‘Error loading VrayForRhino’. I’ve tried every possible way to resolve this, uninstalling both rhino and vray but still dosent work. Any advise would be super helpful!