Flask - Gevent Error
This is probably a 32-bit/64-bit mismatch between the Python binary and the gevent DLL.
My guess is that your Python is 64-bit and you installed the 32-bit Gevent. If this is the case, then uninstall gevent and then download the 64-bit version here. Alternatively you can install Python 32-bit and then install the official Gevent installer on it.