NameError uninitialized constant Aws::STS - ruby

Question

Not sure what I'm missing here. As I have two projects. One that works, and one that gives me this error:
NameError (uninitialized constant Aws::STS)
And I don't see a difference, even down to the versions of Ruby gems I'm using.
The list of gems in my WORKING project is:
Using rake 13.0.6
Using concurrent-ruby 1.1.10
Using i18n 1.10.0
Using minitest 5.15.0
Using tzinfo 2.0.4
Using zeitwerk 2.5.4
Using activesupport 6.1.5
Using builder 3.2.4
Using erubi 1.10.0
Using racc 1.6.0
Using nokogiri 1.12.5 (x86_64-linux)
Using rails-dom-testing 2.0.3
Using crass 1.0.6
Using loofah 2.16.0
Using rails-html-sanitizer 1.4.2
Using actionview 6.1.5
Using rack 2.2.3
Using rack-test 1.1.0
Using actionpack 6.1.5
Using nio4r 2.5.8
Using websocket-extensions 0.1.5
Using websocket-driver 0.7.5
Using actioncable 6.1.5
Using globalid 1.0.0
Using activejob 6.1.5
Using activemodel 6.1.5
Using activerecord 6.1.5
Using marcel 1.0.2
Using mini_mime 1.1.2
Using activestorage 6.1.5
Using mail 2.7.1
Using actionmailbox 6.1.5
Using actionmailer 6.1.5
Using actiontext 6.1.5
Using activemodel-serializers-xml 1.0.2
Using activeresource 6.0.0
Using public_suffix 4.0.7
Using addressable 2.8.0
Using aws-eventstream 1.2.0
Using aws-sigv4 1.5.0
Using json 2.6.1
Using ffi 1.15.5
Using ethon 0.15.0
Using typhoeus 1.4.0
Using amz_sp_api 0.2.2
Using awesome_print 1.9.2
Using aws-partitions 1.587.0
Using jmespath 1.6.1
Using aws-sdk-core 3.130.2
Using aws-sdk-signer 1.38.0
Using aws-sdk-sqs 1.51.1
Using bindex 0.8.1
Using msgpack 1.5.1
Using bootsnap 1.11.1
Using browser_sniffer 1.4.0
Using bundler 2.3.4
Using byebug 11.1.3
Using matrix 0.4.2
Using regexp_parser 2.3.0
Using xpath 3.2.0
Using capybara 3.36.0
Using childprocess 4.1.0
Using chronic 0.10.2
Using connection_pool 2.2.5
Using faraday-net_http 2.0.2
Using ruby2_keywords 0.0.5
Using faraday 2.2.0
Using faraday-typhoeus 0.2.0
Using faraday_middleware-aws-sigv4 0.5.0
Using thor 1.2.1
Using figaro 1.2.0
Using graphql 1.13.11
Using graphql-client 0.17.0
Using hashie 5.0.0
Using mime-types-data 3.2022.0105
Using mime-types 3.4.1
Using multi_xml 0.6.0
Using httparty 0.20.0
Using jbuilder 2.11.5
Using jwt 2.3.0
Using rb-fsevent 0.11.1
Using rb-inotify 0.10.1
Using listen 3.7.1
Using method_source 1.0.0
Using money 6.16.0
Using multi_json 1.15.0
Using oauth2 1.4.9
Using rack-protection 2.2.0
Using omniauth 2.0.4
Using omniauth-oauth2 1.7.2
Using omniauth-rails_csrf_protection 1.0.1
Using omniauth-shopify-oauth2 2.3.2
Using pagy 5.10.1
Using pg 1.3.5
Using pg_search 2.3.6
Using puma 4.3.12
Using rack-cors 1.1.1
Using rack-proxy 0.7.2
Using rack-timeout 0.6.3
Using railties 6.1.5
Using sprockets 4.0.3
Using sprockets-rails 3.4.2
Using rails 6.1.5
Using redirect_safely 1.0.0
Using redis 4.6.0
Using rexml 3.2.5
Using rounding 1.0.1
Using ruby-limiter 2.2.2
Using rubyzip 2.3.2
Using tilt 2.0.10
Using sassc-rails 2.1.2
Using sass-rails 6.0.0
Using selenium-webdriver 4.1.0
Using shopify_api 9.5.1
Using shopify_app 18.0.3
Using sidekiq 6.4.1
Using turbolinks-source 5.2.0
Using turbolinks 5.2.1
Using webdrivers 5.0.0
Using webpacker 4.3.0
Using whenever 1.0.0
Then the list of gems in my NON-WORKING project is this:
Using rake 13.0.6
Using concurrent-ruby 1.1.10
Using i18n 1.12.0
Using minitest 5.16.3
Using tzinfo 2.0.5
Using zeitwerk 2.6.0
Using activesupport 6.1.7
Using builder 3.2.4
Using erubi 1.11.0
Using mini_portile2 2.8.0
Using racc 1.6.0
Using nokogiri 1.13.8 (x86_64-linux)
Using rails-dom-testing 2.0.3
Using crass 1.0.6
Using loofah 2.19.0
Using rails-html-sanitizer 1.4.3
Using actionview 6.1.7
Using rack 2.2.4
Using rack-test 2.0.2
Using actionpack 6.1.7
Using nio4r 2.5.8
Using websocket-extensions 0.1.5
Using websocket-driver 0.7.5
Using actioncable 6.1.7
Using globalid 1.0.0
Using activejob 6.1.7
Using activemodel 6.1.7
Using activerecord 6.1.7
Using marcel 1.0.2
Using mini_mime 1.1.2
Using activestorage 6.1.7
Using mail 2.7.1
Using actionmailbox 6.1.7
Using actionmailer 6.1.7
Using actiontext 6.1.7
Using activemodel-serializers-xml 1.0.2
Using activeresource 6.0.0
Using public_suffix 5.0.0
Using addressable 2.8.1
Using aws-eventstream 1.2.0
Using aws-sigv4 1.5.1
Using json 2.6.2
Using ffi 1.15.5
Using ethon 0.15.0
Using typhoeus 1.4.0
Using amz_sp_api 0.2.2
Using awesome_print 1.9.2
Using aws-partitions 1.587.0
Using jmespath 1.6.1
Using aws-sdk-core 3.130.2
Using aws-sdk-signer 1.38.0
Using aws-sdk-sqs 1.51.1
Using aws-sdk-sts 1.7.0
Using bindex 0.8.1
Using msgpack 1.5.6
Using bootsnap 1.13.0
Using browser_sniffer 1.4.0
Using redis 4.8.0
Using brpoplpush-redis_script 0.1.2
Using bundler 2.3.4
Using byebug 11.1.3
Using matrix 0.4.2
Using regexp_parser 2.6.0
Using xpath 3.2.0
Using capybara 3.37.1
Using childprocess 4.1.0
Using chronic 0.10.2
Using numerizer 0.1.1
Using chronic_duration 0.10.6
Using coderay 1.1.3
Using connection_pool 2.3.0
Using multi_json 1.15.0
Using dogapi 1.45.0
Using easypost 4.8.0
Using excon 0.92.5
Using faraday-net_http 3.0.0
Using ruby2_keywords 0.0.5
Using faraday 2.5.2
Using faraday-typhoeus 0.2.1
Using faraday_middleware-aws-sigv4 0.5.0
Using thor 1.2.1
Using figaro 1.2.0
Using graphql 2.0.14
Using graphql-client 0.18.0
Using hashie 5.0.0
Using mime-types-data 3.2022.0105
Using mime-types 3.4.1
Using multi_xml 0.6.0
Using httparty 0.20.0
Using jbuilder 2.11.5
Using jeff 2.0.2
Using jwt 2.5.0
Using rb-fsevent 0.11.2
Using rb-inotify 0.10.1
Using listen 3.7.1
Using method_source 1.0.0
Using money 6.16.0
Using version_gem 1.1.1
Using snaky_hash 2.0.1
Using oauth2 2.0.9
Using rack-protection 3.0.1
Using omniauth 2.1.0
Using omniauth-oauth2 1.8.0
Using omniauth-rails_csrf_protection 1.0.1
Using omniauth-shopify-oauth2 2.3.2
Using pagy 5.10.1
Using peddler 2.4.5
Using pg 1.4.3
Using pg_search 2.3.6
Using pry 0.14.1
Using slop 3.6.0
Using pry-remote 0.1.8
Using puma 4.3.12
Using rack-proxy 0.7.4
Using rack-timeout 0.6.3
Using railties 6.1.7
Using sprockets 4.1.1
Using sprockets-rails 3.4.2
Using rails 6.1.7
Using redirect_safely 1.0.0
Using redis-prescription 1.0.0
Using rexml 3.2.5
Using ruby-limiter 2.2.2
Using rubyzip 2.3.2
Using sassc 2.4.0
Using tilt 2.0.11
Using sassc-rails 2.1.2
Using sass-rails 6.0.0
Using websocket 1.2.9
Using selenium-webdriver 4.5.0
Using shopify_api 9.5.1
Using shopify_app 18.0.3
Using sidekiq 6.5.7
Using sidekiq-status 2.1.3
Using sidekiq-throttled 0.17.0
Using sidekiq-unique-jobs 7.1.27
Using spring 2.1.1
Using spring-watcher-listen 2.0.1
Using turbolinks-source 5.2.0
Using turbolinks 5.2.1
Using web-console 4.2.0
Using webdrivers 5.1.0
Using webpacker 4.3.0
Using whenever 1.0.0
Then the actual code is exactly the same!
module Amazon::GetAwsTempKeyService
module_function
def call
sts_client = Aws::STS::Client.new(
region: "us-east-1", #pretty sure this is just tied to my creds, so this is static
credentials: Aws::Credentials.new(ENV["AWS_CLIENT_ID"], ENV["AWS_CLIENT_SECRET"]) #same here, these are the app's keys
)
sts_client.assume_role({
role_arn: ENV["ROLE_ARN"], #static as this is the role arn associated with my user in AWS
role_session_name: "SPSession"
}).to_h[:credentials]
#this includes the [:access_key_id] [:secret_access_key] AND [:session_token]
end
end
No idea where I went wrong?! I made sure those ENV variables are defined correctly.