Issue: Xenforo VaultWiki

Is this a new installation or an upgrade? If an upgrade, from what version?
Do you have any other errors in your logs that were generated by VaultWiki?

This error occurs when there is a corrupt area cache, usually due to a corrupt area from another error.

However, it is possible to trigger this error with a race condition:
- While manually creating a new area, you or any other user visits the forum home page or any wiki page in the same microsecond. This might generate a cache containing the new area with a NULL pageid.

There are some edits that can make the error go away. In vault/core/model/area/vw.php, find:
Replace with:
Find:
Replace with:
Find:
After it, add:
While these changes should hide the reported database error, if the error was caused by anything other than a race condition, then there is corrupt data present that will probably cause other problems, and you will need to provide more information about your wiki.

I ran the SQL statement in SQL and it didn't work gave me an error

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND nodetypeid = 1'

so:

ERROR:
'SELECT updateid FROM `vw_lastupdatecache` WHERE userid = 1 AND `nodeid` IN (4,) AND nodetypeid = 1'

but when i changed the statement in SQL to:
SELECT updateid FROM `vw_lastupdatecache` WHERE userid = 1 AND `nodeid` IN (4) AND nodetypeid = 1

It worked

Thing is I don't know where at in your code to edit this SQL statement i went to all files that are shown in the error page

If that edit did not work, I think your wiki has no index page. This means your entire wiki is broken, because everything depends on there being a valid index.

The index is added to this query in vault/core/view/factory/last/vw.php around line 175:
It feeds into ::prepare_updates a few lines later. If you remove this line, you will probably see an error like "The node called 'Wiki' could not be found" when you try to go to the wiki.

Is this a new installation, or an upgrade?
- If it is a new installation, you should uninstall and re-install, but ONLY if it is a new installation (uninstall will erase your wiki). The install process should generate the index.
- If this was an upgrade, then you will need a private ticket in order to fix the problem.

If your wiki has no index page, did you install VaultWiki as the Lite version with version 4.0.14 or 4.0.15? If so, I believe that this error might have caused your problems: https://www.vaultwiki.org/issues/4804/
If this was a fresh installation, you can uninstall+reinstall to regenerate the missing index. Otherwise, you will need to wait for the 4.0.16 upgrade, or request the ticket I mentioned above in order to get the index regenerated.