Hello, can you please aid with the following error?

Traceback (most recent call last):
File "ssma.py", line 141, in
_tls = pe.checkTSL()
File "/home/user/Downloads/SSMA-master/src/check_file.py", line 243, in checkTSL
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_TLS']].VirtualAddress
IndexError: list index out of range
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python3/dist-packages/apport/init.py", line 5, in
from apport.report import Report
File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in
import apport.fileutils
File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in
from apport.packaging_impl import impl as packaging
File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 23, in
import apt
File "/usr/lib/python3/dist-packages/apt/init.py", line 23, in
import apt_pkg
ModuleNotFoundError: No module named 'apt_pkg'

Original exception was:
Traceback (most recent call last):
File "ssma.py", line 141, in
_tls = pe.checkTSL()
File "/home/user/Downloads/SSMA-master/src/check_file.py", line 243, in checkTSL
pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_TLS']].VirtualAddress
IndexError: list index out of range