Whichever portal you are trying to access, is attempting to utilize a method called WarpInstanceOut() inside ScriptManagerImpl.java.
The easy fix would be to check ScriptManagerImpl.java for what methods have WarpInstanceOut() and check the portal python script to see what it is trying to invoke. Odds are the portal is attempting to use too many arguments or too few arguments for the portal to warp you out, compared to what ScriptMangerImpl.java actually has.
When you attempt to access the portal, it should give you a name / ID for the portal inside chat in game. Could you list the name here?