DNF command fails when run as a non root user

Issue

DNF commands when run as a non-root user, it is failing with the below error:

# dnf list
Traceback (most recent call last):
  File "/usr/bin/dnf", line 62, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 201, in user_main
    errcode = main(args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 66, in main
    with dnf.cli.cli.BaseCli(conf_class()) as base:
  File "/usr/lib/python3.6/site-packages/dnf/conf/config.py", line 210, in __init__
    config = libdnf.conf.ConfigMain()
  File "/usr/lib64/python3.6/site-packages/libdnf/conf.py", line 1402, in __init__
    this = _conf.new_ConfigMain()
RuntimeError: addFromFile(): Can't open file
Exception ignored in: <bound method MainConf.__del__ of <dnf.conf.config.MainConf object at 0x151254120cc0>>
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/dnf/conf/config.py", line 236, in __del__
    for file_name in self.tempfiles:
  File "/usr/lib/python3.6/site-packages/dnf/conf/config.py", line 66, in __getattr__
    raise AttributeError("'{}' object has no attribute '{}'".format(self.__class__, name))
AttributeError: '<class 'dnf.conf.config.MainConf'>' object has no attribute 'tempfiles'