Error message on GTK+4 Manual

[June Rana <junesagerana gmail com>]

Hello All,

Many of the pre.programlisting tags (designed to contain code examples) in the GTK+4 manual are populated with the message "MISSING XINCLUDE CONTENT" --  most notably, the first ten examples of GTK+4 code in the manual, and many more (intermittently) after that.

As far as I know, this occurs on Firefox with local tor proxy and on vanilla Chromium. 

The Best,

June Rana