Open har file with charles error

I use mitmdump and har_dump.py to convert the file to jar,but when Iopen it with charles,it,s error,
MalformedJson:Use JsonReader.setLenient(true) to accept malformed JSON

Mitmproxy: 3.0.3
Python: 3.5.2
OpenSSL: OpenSSL 1.1.0g 2 Nov 2017
Platform: Linux-2.6.32-431.el6.x86_64-x86_64-with-centos-6.5-Final

the har_dump.py is

the dump file is as follow link
https://send.firefox.com/download/3f8be846da/#UzMW099RgcYaG-J2uDbUkg