You need to un-comment the block, look at colorization on Discourse, it’s INI file : INI file - Wikipedia
[qgisWrapper]
; If off, FCGI is not allowed, only Py-QGIS-Server or QJazz
; https://docs.lizmap.com/current/en/install/py-qgis-server.html
; https://docs.3liz.org/py-qgis-server/
; https://github.com/3liz/qjazz
allowFcgi=on
Does it work ?