I recently successfully downloaded the Krita Installer and Portable version on my Surface Pro, however when I try to run the program it says that the app is unable to run on my system and I should contact the publisher for a version that works.
Krita Requirements Operating System :Windows 8.1 or Higher, OSX 10.12, Linux RAM :Recommended 4GB or higher Optional GPU :OpenGL 3.0 or higher Graphics Tablet Supported :Wacom, Huion, Yiyinova, Surface Pro
My System Operating System Windows 10 RAM 8 GB Optional GPU Graphics Tablet Supported Surface Pro
You will have to tell us which Surface Pro exactly, but I will go ahead of myself here and say that is a model with an ARM processor, like the Surface Pro X.
If yes, then this compatibility issue is an old headache for its buyers.
However, this Windows for ARM has a compatibility layer for 32-bit apps, so you can try the last 32-bit Krita released: Krita 4.4.3
Note that this is an old version from 03/2021. So no new features or bug fixes.