locations#show (NoMethodError) "undefined method `id' for nil:NilClass"

A NoMethodError occurred in locations#show:

 undefined method `id' for nil:NilClass
 app/models/error_message.rb:13:in `block in <class:ErrorMessage>'


-------------------------------
Request:
-------------------------------

 * URL        : https://35.83.0.123/locations/bike_hangars_datagrid
 * HTTP Method: GET
 * IP address : 35.173.138.142
 * Parameters : {"controller"=>"locations", "action"=>"show", "id"=>"bike_hangars_datagrid"}
 * Timestamp  : 2023-11-06 08:38:15 UTC
 * Server : www-6.internal.bikelink.org
   * Rails root : /var/www/bikelink
 * Process: 8983

-------------------------------
Session:
-------------------------------

 * session id: [FILTERED]
 * data: {}

-------------------------------
Backtrace:
-------------------------------

 app/models/error_message.rb:13:in `block in <class:ErrorMessage>'
 app/controllers/locations_controller.rb:126:in `show'
 app/controllers/application_controller.rb:45:in `process_action'
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