I took a quick look at search results for that error, and I think I see the problem.
A common issue is that the directory for temporary files (wgTmpDirectory in LocalSettings.php) is not writable. Looking at your configuration, you are trying to use the folder temp in the root of your account for this. This will not work, because all PHP scripts on our hosting can only access files within their own htdocs folder.
Instead, you could create a temp folder (or better yet - a randomly named directory like the original setting had) in your htdocs folder and use that for the temporary files.