io_scs_tools have problem with converting

[ELRICOFATAL]

so yeah last time have problem with blender addon cuz on any version blender have same error not matter if is 2.78 or 2.81 both of then give same error with convert from .pim to .pmd
all of them give that result

Can't convert 'NoneType' object to str implicitly

and here below is expl of error report

Code: Select all

ERROR   -  Unexpected 'TypeError' accured during import:
           Traceback (most recent call last):
             File "E:\BLENDER\2.78\scripts\addons\io_scs_tools\__init__.py", line 115, in execute
               result = _pix_import.load(context, filepath)
             File "E:\BLENDER\2.78\scripts\addons\io_scs_tools\imp\pix.py", line 357, in load
               pis_filepath = os.path.dirname(filepath) + os.sep + skeleton
           TypeError: Can't convert 'NoneType' object to str implicitly
           
ERROR   -  Following files failed to load:
           -> 'test.pim'


           ERROR SUMMARY:
           ================
           > Unexpected 'TypeError' accured during import:
             Traceback (most recent call last):
               File "E:\BLENDER\2.78\scripts\addons\io_scs_tools\__init__.py", line 115, in execute
                 result = _pix_import.load(context, filepath)
               File "E:\BLENDER\2.78\scripts\addons\io_scs_tools\imp\pix.py", line 357, in load
                 pis_filepath = os.path.dirname(filepath) + os.sep + skeleton
             TypeError: Can't convert 'NoneType' object to str implicitly
             
           > Following files failed to load:
             -> 'test.pim'
           ================

andy idea how to fix