Update endpoint path for the frontend

app/views/projects/boards/index.html.haml

+- @no_container = true
+- @content_class = "issue-boards-content"
+- page_title "Boards"
+
+- content_for :page_specific_javascripts do
+  = page_specific_javascript_tag('boards/boards_bundle.js')
+  = page_specific_javascript_tag('boards/test_utils/simulate_drag.js') if Rails.env.test?
+
+= render "projects/issues/head"
+
+= render 'shared/issuable/filter', type: :boards
+
+.boards-list#board-app{ "v-cloak" => true,
+  "data-endpoint" => "#{namespace_project_board_path(@project.namespace, @project, @boards.first)}",
+  "data-disabled" => "#{!can?(current_user, :admin_list, @project)}",
+  "data-issue-link-base" => "#{namespace_project_issues_path(@project.namespace, @project)}" }
+  .boards-app-loading.text-center{ "v-if" => "loading" }
+    = icon("spinner spin")
+  = render "projects/boards/components/board"

app/views/projects/boards/show.html.haml

@@ -11,7 +11,7 @@
 = render 'shared/issuable/filter', type: :boards
 
 .boards-list#board-app{ "v-cloak" => true,
-  "data-endpoint" => "#{namespace_project_boards_path(@project.namespace, @project)}",
+  "data-endpoint" => "#{namespace_project_board_path(@project.namespace, @project, @board)}",
   "data-disabled" => "#{!can?(current_user, :admin_list, @project)}",
   "data-issue-link-base" => "#{namespace_project_issues_path(@project.namespace, @project)}" }
   .boards-app-loading.text-center{ "v-if" => "loading" }