This is probably giving an error due to the
“ ”
in the OrangeMeeples post.

Try this:
sed -i "772,775d" /opt/node_modules/@node-red/util/lib/util.js
This is probably giving an error due to the
“ ”
in the OrangeMeeples post.

Try this:
sed -i "772,775d" /opt/node_modules/@node-red/util/lib/util.js