I suppose the issue might be related to X2? Well… in general, you need to assign a voltage source (25V) to Tcase to set the case temperature but not the junction temperature. But just guessing, the best is that you can upload your schematic.
Read this post and increase your trust level to upload your schematic.
Qspice Forum - New User to Basic User (File Upload) - QSPICE - Qorvo Tech Forum