[B3rt]

Trying to connect to the wiki on http://kodi.wiki/

But keep getting a error that this page is offline, what is the correct url?

[Klojum]

You have the correct URL.
The Kodi wiki server is currently off-line.
Please be patient and try again again at a later date/time.

[B3rt]

and how long wil this take, can not reach the wiki pages for some several days now

[Klojum]

and how long wil this take

As long as it is necessary to properly install all wiki machine stuff and it's 100% working. Basically, "until it's ready".

And like the banner says: "We will update you when it arrives".

[DarrenHill]

and how long wil this take, can not reach the wiki pages for some several days now

It's been down for less than 24 hours as of now (it was fine last night).

So you may have other issues, although of course now is not the time to look into them.