The "Report an error in Bugzilla" link points to a non-existent (404) GitLab project "GIMP-manual", should be "GIMP-help"
The link at the bottom of the page (and linked manual pages) of
https://docs.gimp.org/2.10/en/
points to
https://gitlab.gnome.org/GNOME/GIMP-manual/issues/new
which results in a 404 error .
Also don't forget to change the text of the link to "Report an error in GitLab" instead of Bugzilla