Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport/report.py", line 227, in _run_hook
    symb['add_info'](report, ui)
  File "/usr/share/apport/general-hooks/ubuntu.py", line 84, in add_info
    apport.hookutils.attach_casper_md5check(report,
  File "/usr/lib/python3/dist-packages/apport/hookutils.py", line 945, in attach_casper_md5check
    with open(location) as json_file:
PermissionError: [Errno 13] Permission denied: '/var/log/installer/casper-md5check.json'