Ok, I've added a file "Neofeud - Itch Client Version" that should work in the Itch Client. Maybe give it a try?
No luck I'm afraid, still "This title is hosted on an incompatible third-party website.".
EDIT: Ok, this is kind of odd. Checking it out through the website, the "Itch client version" is still hosted on google drive and says it was uploaded around 2 years ago. The version entitled "Neofeud version 1.3" which was hosted on google drive before now says it was updated 2 days ago and is no longer hosted on google drive. Weirdly though, that version doesn't show up in the client, like maybe there's a flag set to stop it from appearing as an option on the client?
Is it possible that you got mixed up and the old non-working version 1.3 got renamed to "itch client version" and the new fixed one got named "version 1.3"? Given that one was modified 2 days ago and the other one was 2 years ago it seems like that's what might have happened. Assuming there are flags that say whether it's visible in the itch client or not, you probably just have to swap the flags.