Dark Mode failure on WinCVS

I installed a portable version and attempted to turn on Dark mode for WinCVS and it did not work. It stayed in light mode and in the lower right corner where the clock is there was an error message (attached).

<img width="358" height="117" alt="Image" src="https://github.com/user-attachments/assets/cc88e897-5430-47f4-aaa9-a9409fa07dd6" />

Thank you,

-Chris N.

