Windows Server 2019 + NVIDIA GeForce GTX 750 Ti = cuInit(): no CUDA-capable device

[v71221]

Please double-check if NVidia do officially support the specific operating system you want to use.

Read here
https://hashcat.net/wiki/doku.php?id=fre..._the_gpu_s
https://hashcat.net/faq/wrongdriver

Try a freshly installed Windows 10 (not Windows Server).
Also you can try to isolate the problem using Linux.
Please see here
https://hashcat.net/forum/thread-11349.html
https://wiki.archlinux.org/title/GPGPU