work_orders#show (ActionView::Template::Error) "undefined method `full_name' for nil:NilClass"

An ActionView::Template::Error occurred in work_orders#show:

 undefined method `full_name' for nil:NilClass
 app/views/work_orders/_description_for_abandoned.html.erb:2


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

 * URL        : https://bikelink.org/work_orders/1086
 * HTTP Method: GET
 * IP address : 174.21.163.6
 * Parameters : {"controller"=>"work_orders", "action"=>"show", "id"=>"1086"}
 * Timestamp  : 2022-11-07 17:13:25 UTC
 * Server : www-5.internal.bikelink.org
   * Rails root : /var/www/bikelink
 * Process: 17164

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

 * session id: [FILTERED]
 * data: {"session_id"=>"1e65f6cffe304a2677c362d820c5a983",
  "warden.user.person.key"=>[[50587], "n3ZqnfysSnJmUXXMBU5v"],
  "_csrf_token"=>"0L0CiwHBfeo6KsZWDPoN8EkQCedlA82EUkVnYphF95E=",
  "params_for_filter"=>
   {"filter_by_location"=>nil,
    "filter_by_owner"=>nil,
    "filter_by_state"=>2,
    "filter_by_priority"=>nil}}

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

 app/views/work_orders/_description_for_abandoned.html.erb:2
 app/views/work_orders/show.html.erb:55
 app/controllers/concerns/time_zoned_location_param.rb:17:in `handle_time_zone'
 app/controllers/application_controller.rb:44:in `process_action'
Reload