[Forum] not accepting code in answers to the topic

The user tries to send code within "pre" tags or with leading "$" or commands without them in separate lines and the posting fails with a message: "forbidden; you do not have access to this resource". Is AI or ML being used to policy posts?

E.g. https://trisquel.info/en/forum/lilypond-oolylibreoffice-needs-lilypond-perhaps-v2244-fix-cairo-rendering-svg