Stop server
Click "Configuration Files"
Click Text Editor next to "KFGame\Config\KFWeb.ini"
Find the line: bEnabled=false
Change the value from false
to true
Save the file
Start server.
You may also want to perform this process as it makes the web admin more reliable: https://pingperfect.com/index.php/knowledgebase/972/Killing-Floor-2--Invalid-Form-Data.html
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