Redmine

Thought I'd try here first as Bitnami recommends checking with the app support first. I'm trying to install the Redmine Banner plugin: https://www.redmine.org/plugins/redmine_banner

I'm following the install info from: https://github.com/agileware-jp/redmine_banner

I've copied the plugin to <install_dir>\apps\redmine\htdocs\plugins\redmine_banner and when I try and execute the rake command it continues to give me "ruby: No such file or directory -- rake (LoadError)"

I'm executing the command from <install_dir>\apps\redmine\htdocs\plugins\redmine_banner which does have a rake file in it and the command I'm executing is:

<install_dir>\ruby\bin\ruby rake redmine:plugins:migrate RAILS_ENV=production

I'm new to redmine, rake, etc. and any help would be appreciated. I know ruby and rake work because I've been through a couple Redmine upgrades which needs to run db:dbmigrate