I set up a 4-port MWS model to simulate the S-parameters of a FPC. After the port 1 simulation was done, the simulation stopped and showed the below message when CST Studio Suite tried to conduct the port 2 simulation.

Time Domain Solver (HEX): Terminated abnormally.

I tried it twice and the simulation stopped twice because of the same error.
I have simulated similar models several times before and this is my first time encountered this issue.
I am using CST Studio Suit 2022 Release Version 2022.05 - Jun 03 2022, and attached is the log file copy.
Is there any manual/tutorial can help me solve this issue? Thanks.