I'm testing the EC2 Compute Resources in Satellite 6.2. However, I try to add my EC2 account details and click Load Regions. It fails to load the regions and returns the following error:

"AuthFailure => AWS was not able to validate the provided access credentials"

production.log shows the following:

2016-04-29 05:07:59 [app] [I] Started PUT "/compute_resources/test_connection" for 192.168.125.1 at 2016-04-29 05:07:59 +1000
2016-04-29 05:07:59 [app] [I] Processing by ComputeResourcesController#test_connection as */*
2016-04-29 05:07:59 [app] [I]   Parameters: {"utf8"=>"✓", "authenticity_token"=>"tSKnqYsuUAcjsA5Zz7+7A6oGaIbDc/nLHnm50Zt/iYU=", "compute_resource"=>{"name"=>"EC2", "provider"=>"EC2", "description"=>"", "user"=>"AKIAIXCHKTHSDRW7JFWA", "password"=>"[FILTERED]", "location_ids"=>[""], "organization_ids"=>["", "3"]}, "fakepassword"=>"[FILTERED]", "cr_id"=>"null"}
2016-04-29 05:07:59 [app] [I] CR_ID IS null
2016-04-29 05:08:10 [app] [I]   Rendered compute_resources/form/_ec2.html.erb (5482.1ms)
2016-04-29 05:08:10 [app] [I]   Rendered taxonomies/_loc_org_tabs.html.erb (29.8ms)
2016-04-29 05:08:10 [app] [I]   Rendered compute_resources/_form.html.erb (5531.8ms)
2016-04-29 05:08:10 [app] [I] Completed 200 OK in 11318ms (Views: 5529.0ms | ActiveRecord: 17.4ms)

Version-Release number of selected component (if applicable):
foreman-ec2.noarch.1.11.0.17-1.el7sat

How reproducible:
Always

Steps to Reproduce:
1. Add EC2 provider in UI
2. Click "Load Regions"

Actual results:
Error appears

Expected results:
No error appears, region list should appear

Additional info:
foreman-ec2 didn't seem to be install with a default Satellite 6.2 Beta installation, so I installed this package separately.