Mediawiki XenforoAuth and bdapi

[Rushster]

I have set up everything correctly to best of my knowledge but all I can get back from Xenforo is...

{
"status": "error",
"errors": [
"The requested page could not be found."
]
}

I saw someone else had this issue but they were using Nginx but we are on apache so not sure how to resolve this.

The requested URL looking at the API logs comes out as:

/forums/wikilogin/index.php?oauth/authorize/&client_id=iZEETHke9B&redirect_uri=https%3A%2F%2Fwww.domain.com%2Fdirectory%2Findex.php%3Ftitle%3DSpecial%3ACreateAccount%2Freturn%26wpCreateaccountToken%3D66c1032a635d19002908b0eb1042a84d62acc772%252B%255C%26returnto%3DMain%2BPage&response_type=code&scope=read

Any idea if this is a known issue? Desperate to get this working with XenforoAuth for Mediawiki.