I double-checked everything on my end, so my only guess at this point is that's your're using an ancient CPU without AVX2 support, or something is preventing KoboldCPP from creating the _MEI folder in temp.
If you're using a very old CPU (pre 2013 for intel and pre 2015 for AMD) you could try replacing your koboldcpp.exe with https://github.com/LostRuins/koboldcpp/releases/download/v1.76/koboldcpp_oldcpu.... and/or selecting "Use Vulkan (Old CPU)".
If you're not using an ancient CPU you could try disabling your antivirus, but I doubt that's the reason.