I downloaded the Wifi_Fix_Files.rar is, unpacked, but Root Explorer sent me copying the error message.
The solution for me: TWRP 188.8.131.52 -> Mount menu -> check everywhere (except SD-EXT)
then back home -> File Manager -> EMMC folder -> Download folder (or wherever you packed out) -> Wifi Fix Files folder -> WiFi takes hold -> Copy
up to level -> data ... -> the other in the same way as above. I'll repeat this again in another file as well. Reboot and it works.
Sorry for my English, I am using Google Translate.