CST simulation in 180 hybrid coupler

Hello everyone,
I am trying to simulate 180 hybrid coupler using CST MWS. I define all 4 the ports using discrete port system. During simulation it showing some errors that I also attached over here.
Does any one know how to solve the problem?
I tried to attach the geometry but it system did not able to recognize the cst file.
Advance thanks for your kind help.
Thanks,

try to put the mic. line parallel to the substrate by adding the same length to 4 port