With the new version of Pagy, the 'gap' has a different I18n reference.

The 'gap' refers to the three dots that are rendered if there are more
pages in the index than can be rendered on the screen at once.

app/helpers/pagy_helper.rb

@@ -26,7 +26,7 @@ def pagy_nav_govuk(pagy)
       html << case item
               when Integer then %(<li class="govuk-pagination__item"><a>#{link.call item}</a></li>) # page link
               when String then %(<li class="govuk-pagination__item govuk-pagination__item--current"><a>#{item}</a></li>) # current page
-              when :gap then %(<li class="govuk-pagination__item">#{pagy_t('pagy.nav.gap')}</li>) # page gap
+              when :gap then %(<li class="govuk-pagination__item">#{pagy_t('pagy.gap')}</li>) # page gap
               end
     end
     html << %(</ul>)

spec/features/super_admin/organisations/view_organisation_page_spec.rb

@@ -6,7 +6,7 @@
       100.times { organisation.locations << create(:location, organisation:) }
       sign_in_user create(:user, :super_admin)
       visit super_admin_organisation_path(organisation)
-      expect(page.body).to include(Pagy::I18n.translate(nil, "pagy.nav.gap"))
+      expect(page.body).to include(Pagy::I18n.translate(nil, "pagy.gap"))
     end
   end