I'm using WinRAR 7.20 and following the instructions, but I keep getting the password wrong for the second layer. I even tried online support for direct extraction, but the password is still incorrect.
Could you please double-check the password at the second layer .
I've done exactly what you said before many times. If there's a software decompression error, it won't be able to decompress the first layer, but after the first layer finishes decompressing, it reports an incorrect password for the second layer.