License renewal fails with 500 (NoMethodError in `find_user_by_bp_username`)

[jvendetti]

A user reported they can't renew their license:

Hi all, I have an issue renewing my licence. I get the following message when I submit the licence form: We're sorry but something went wrong

Sanitized stack trace from the production log file:

I, [2026-05-21T01:32:51.932509 #138756]  INFO -- : [REQUEST_ID] Started POST "/licenses" at 2026-05-21 01:32:51 -0700
I, [2026-05-21T01:32:51.933264 #138756]  INFO -- : [REQUEST_ID] Processing by LicensesController#create as HTML
I, [2026-05-21T01:32:51.933364 #138756]  INFO -- : [REQUEST_ID]   Parameters: {"utf8"=>"✓", "authenticity_token"=>"[REDACTED]", "license"=>{"appliance_id"=>"[REDACTED-UUID]", "first_name"=>"[REDACTED]", "last_name"=>"[REDACTED]", "organization"=>"[REDACTED]", "license_purpose_id"=>"2", "project_info"=>"[REDACTED]", "reason"=>"Continuing operations"}, "update"=>"Create License"}
I, [2026-05-21T01:32:52.893302 #138756]  INFO -- : [REQUEST_ID] Completed 500 Internal Server Error in 960ms (ActiveRecord: 0.0ms)
F, [2026-05-21T01:32:52.894257 #138756] FATAL -- : [REQUEST_ID]   
F, [2026-05-21T01:32:52.894357 #138756] FATAL -- : [REQUEST_ID] NoMethodError (undefined method `first' for nil:NilClass):
F, [2026-05-21T01:32:52.894424 #138756] FATAL -- : [REQUEST_ID]   
F, [2026-05-21T01:32:52.894496 #138756] FATAL -- : [REQUEST_ID] app/helpers/application_helper.rb:11:in `find_user_by_bp_username'
[REQUEST_ID] app/controllers/licenses_controller.rb:257:in `validate'
[REQUEST_ID] app/controllers/licenses_controller.rb:196:in `save_license_from_params'
[REQUEST_ID] app/controllers/licenses_controller.rb:88:in `create'

[jvendetti]

Root cause: API/client version mismatch.

The /users endpoint in ontologies_api now returns a paginated response (an object with collection, page, pageCount, nextPage fields) instead of a flat array. The pinned ontologies_api_client v2.0.0 predates this change and treats the response as the result itself, so LinkedData::Client::Models::User.all returns an OpenStruct rather than an Array.

Confirmed in rails c:

LinkedData::Client::Models::User.all.class                    # => OpenStruct
LinkedData::Client::Models::User.find_by_username('jv_test3') # => nil

Because find_by_username always returns nil, the chained .first in app/helpers/application_helper.rb raises NoMethodError.

A client-side fix already exists in ncbo/ontologies_api_ruby_client#55.