ActionView::Template::Error: undefined method `full_path' for nil:NilClass

https://sentry.gitlap.com/gitlab/gitlabcom/issues/25068/

NoMethodError: undefined method `full_path' for nil:NilClass
  app/views/import/base/unauthorized.js.haml:1:in `_app_views_import_base_unauthorized_js_haml__2826378464202185905_70321657628000'
    :plain
  app/controllers/import/bitbucket_controller.rb:57:in `create'
    render 'unauthorized'
  lib/gitlab/middleware/multipart.rb:93:in `call'
    return @app.call(env) if encoded_message.blank?
  lib/gitlab/request_profiler/middleware.rb:14:in `call'
    @app.call(env)
  lib/gitlab/database/load_balancing/rack_middleware.rb:25:in `call'
    result = @app.call(env)
...
(144 additional frame(s) were not displayed)

ActionView::Template::Error: undefined method `full_path' for nil:NilClass

ActionView::Template::Error: undefined method `full_path' for nil:NilClass

/cc @markglenfletcher