Cannot read the array length because "<local12>" is null

[Freddson]

I was trying to decompile an APK file, and when i used the following arguments:
d2j-dex2jar.bat -f "C:\Users\user\Downloads\żappka pliki\pl.zabka.apb2c.apk"
an error occured stating that the program cannot read the array length because "" is null.
Full error is in the file below:
summary.txt

The errors state that it only occured inside dex2jar code, so I'm assuming it's the fault of the program. If anyone is be able to help, I would be really grateful.

[ThexXTURBOXx]

Try my fork, see #486