kwetza-master Error

[Veranja]

Hi guys
how solve this problem(kwetza-master)..pls help friends.

[*] DECOMPILING TARGET APK
[+] ENDPOINT IP: on
[+] ENDPOINT PORT: pictures_v1.9.2_apkpure.com.apk
Input file (/root/Desktop/kwetza-master/PixelLab) was not found or was not readable.
[+] APKTOOL DECOMPILED SUCCESS
!!!! ERROR IN 'initialize' method
substring not found
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!