Likely as a result of the db encoding change back whenever (like T4482), all the configuration on kkutu.miraheze.org is completely broken and non-accessible. The ManageWiki links do not work, Special pages only work if you know what the exact page title is in the local language, and there are probably more issues that I am unaware of.
To do list:
[X] Reset site name
[X] Un-Close wiki
[X] Set language to en-gb
[ ] Run Rebuild all.php ???
[ ] Restore ko language