[RESOLVED] JSON.parse error on some computers

The exact error is "SyntaxError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data" and I couldn't really pinpoint where the problem is. It is working fine in Windows 10 64 bit and Windows 7 64 bit, isn't it supposed to be not dependent on the OS?

I am just uploading data using "$.ajax({". When checking in the network request, there is no Response being received.

This is giving me a headache, I hope someone here could shed light on this. TIA!