Error loading "evaluations" resource

[khicks5]

After uploading a few evaluations we get the following error when attempting to load the /evaluations page -- all other resources work within the application.

User error:
We're sorry, but something went wrong.

Logs:
[2019-06-07T19:57:31.690511 #1] DEBUG -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] MONGODB | db:27017 | heimdall2_production.find | STARTED | {"find"=>"roles", "filter"=>{"$and"=>[{"_id"=>{"$in"=>[BSON::ObjectId('5cfa8aaf97209f0001d4c6b6'), BSON::ObjectId('5cfa8ab097209f0001d4c6b7'), BSON::ObjectId('5cfa8ae797209f0001d4c6b9'), BSON::ObjectId('5cfa8c3e97209f0001d4f9be')]}}], "$or"=>[{"name"=...
D, [2019-06-07T19:57:31.691294 #1] DEBUG -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] MONGODB | db:27017 | heimdall2_production.find | SUCCEEDED | 0.001s
I, [2019-06-07T19:57:31.695523 #1] INFO -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] Rendered evaluations/index.html.erb within layouts/application (27.7ms)
I, [2019-06-07T19:57:31.695674 #1] INFO -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] Completed 500 Internal Server Error in 44ms
F, [2019-06-07T19:57:31.696361 #1] FATAL -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a]
F, [2019-06-07T19:57:31.696394 #1] FATAL -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] ActionView::Template::Error (NaN):
F, [2019-06-07T19:57:31.696552 #1] FATAL -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] 46:
[486272a0-7b70-4e48-a579-2aaa13e9a03a] 47:

[486272a0-7b70-4e48-a579-2aaa13e9a03a] 48:
[486272a0-7b70-4e48-a579-2aaa13e9a03a] 49:
[486272a0-7b70-4e48-a579-2aaa13e9a03a] 50:
[486272a0-7b70-4e48-a579-2aaa13e9a03a] 51:
[486272a0-7b70-4e48-a579-2aaa13e9a03a] 52:
F, [2019-06-07T19:57:31.696598 #1] FATAL -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a]
F, [2019-06-07T19:57:31.696629 #1] FATAL -- : [486272a0-7b70-4e48-a579-2aaa13e9a03a] app/helpers/application_helper.rb:50:in round' [486272a0-7b70-4e48-a579-2aaa13e9a03a] app/helpers/application_helper.rb:50:in pass_pixels'
[486272a0-7b70-4e48-a579-2aaa13e9a03a] app/views/evaluations/index.html.erb:49:in block (2 levels) in _app_views_evaluations_index_html_erb___1363491149753818499_47278589068880' [486272a0-7b70-4e48-a579-2aaa13e9a03a] app/views/evaluations/index.html.erb:37:in each'
[486272a0-7b70-4e48-a579-2aaa13e9a03a] app/views/evaluations/index.html.erb:37:in block in _app_views_evaluations_index_html_erb___1363491149753818499_47278589068880' [486272a0-7b70-4e48-a579-2aaa13e9a03a] app/views/evaluations/index.html.erb:21:in _app_views_evaluations_index_html_erb___1363491149753818499_47278589068880'

[khicks5]

It appears that I've been able to reproduce the same issue when uploading evaluations via the API.