My StreamDeck was failing, and after some digging, my old trick skills came to the rescue.
It kept crashing with no info to be found on the site or reddit.
Turns out, the culprit was the directx dll d3d9.dll.
This brought back memories of those days spent downloading dlls from the internet, praying they'd not be malware.
But this time, I simply snagged one from a local Windows.old folder and replaced the faulty one in the new install.
Ah, the good-old times returned for a moment.