When I try to add or edit prefixes, it gives an error.
Fatal error: Call to undefined method Xml::hidden() in /home/content/01/7537801/html/EN-40K Sturmkrieg/extensions/Interwiki/Interwiki_body.php on line 165
I'm using the 1.17 version, which on the extension page is the same for 1.18.
This post was posted by Lieutenant S. Reznov, but signed as Inquisitor Ehrenstein.