Erro de Compilação do Discourse: Ocorreu um erro ao instalar rbtrace (0.5.1), e o Bundler não pode continuar

Instalação
7

Debian 9 has been superseded by Debian 10 (“buster”). Security updates have been discontinued as of July 6th, 2020.

You may want to take your backup and migrate to a new server running a current OS version.