RedmineInstall - Redmine1 Support of Ruby 2.5 and earlier has been ended by the Ruby community. See the official announcements for details: 2.3, 2.4, 2.5. 2 Redmine 4.2 does not support Ruby 2.7.0 and 2.7.1. Use Ruby 2.7.2 or higher (see #31500#note-13). Important notices: Redmine does not support JRuby because activerecord-jdbc-adapter and loofah do not support Rails 4.2 or later. Supported database back-ends¶ MySQL 5.5
