Redmine

I am running Redmine version 5.0.5 on Amazon Lightsail and need to integrate it with SAML authentication. I initially tried using the Git URL from Redmine’s official page (https://github.com/chrodriguez/redmine_omniauth_saml.git), but it didn't work. I then found another Git URL (https://github.com/omniauth/omniauth-saml.git), which is said to work on Redmine 5.0.5, but I encountered the following errors.

Could someone please assist with this?

the error below got below during configuration

bitnami@ip-172-26-3-99:/opt/bitnami/redmine$ sudo bundle install --without development tes
t
[DEPRECATED] The `--without` flag is deprecated because it relies on being remembered acro
ss bundler invocations, which bundler will no longer do in future versions. Instead please
use `bundle config set --local without 'development test'`, and stop using this flag
Don't run Bundler as root. Installing your bundle as root will break this application for
all non-root users on this machine.
Fetching gem metadata from https://rubygems.org/.........
Could not find gem 'rack-test (~> 0.6, >= 0.6.3)' with platform 'x86_64-linux' in rubygems
repository https://rubygems.org/ or installed locally.

The source contains the following gems matching 'rack-test (~> 0.6, >= 0.6.3)': * rack-test-0.6.3 * rack-test-0.7.0 * rack-test-0.8.0 * rack-test-0.8.2 * rack-test-0.8.3
bitnami@ip-172-26-3-99:/opt/bitnami/redmine$