Not working on python 3.4.2

[ngunhaSO]

I am trying to run this library on a Raspberry Pi, the stable version at the moment is 3.4.2
When I ran the python script on Raspberry, I got the following error:
"the JSON object must be str, not 'bytes'"

However, when I ran the script on Mac which has Python 3.6.5, everything works fine.

Is this library compatible for python 3.4.2?

Thank you,