解決】An error occurred while installing sqlite3 (1.3.11), and Bundler cannot continue. Make sure that gem install sqlite3 -v '1.3.11' succeeds before bundling. - Qiita
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.の解決策 - Qiita
Unable to update to 5.1.1 on ubuntu 20.04 (bundle issue) - Technical assistance - Zammad - Community