Ask the owner of the source code to give it to you or have him fix it for
Decompiled code is stolen
code. Either you are a thief, a fence, or the
receiver of stolen (intellectual) property. Either way we will not be an
accomplice after the fact to theft. See also https://www.mql5.com/en/forum/134317#comment_3411571
If you post decompiled code again, you will likely be banned.
Don't tell us you found it on the 'net: if someone stole your bank details
and uploaded them on to the internet, is it OK for everyone to use them because
"someone uploaded it, I don't know why I can't use that"?