Looks like an issue with the 32 bit libs, i’ll fix it, but it might be a few days.
actually that build is over a week old, please grab a newer one and the zlib error should already be gone, the blendthumb64 one should still popup, but blender should at least start normally after that.
the zlib one should be gone, the blendthumb one will take a bit longer since it’s an issue in an external dependency, i was able to reproduce the problem, currently working with the author of that code to get a fix in.