Need Help Regarding Menu Magement in admin

Check your PHP memory limit; memory should be 64MB or above.
you can try increasing Memory limit by adding define ('WP_MEMORY_LIMIT', '128M'); in wp-config.php file.

Related Posts:

  1. Remove Pagination in Appearance -> Menus -> Categories
  2. Theme menu in Admin Panel
  3. How to remove menu installed in wp-admin by a theme? [closed]
  4. wp_is_mobile() inside js
  5. Changing the Order of Admin Menu Sections?
  6. Placing a Custom Post Type Menu Above the Posts Menu Using menu_position?
  7. Add separator to admin submenu
  8. Remove unusable metaboxes in nav menu management screen
  9. How do I fix this error: Warning: invalid argument supplied for foreach()?
  10. Menu is invisible in admin panel but it’s visible in front-end [closed]
  11. Add column to pages table
  12. Is it possible to add a filter for the output of nav-menu items in admin?
  13. How to make pages metabox display all hierarchy in menu admin?
  14. Hide pages depending on role
  15. How can I get an array/list of all current WordPress Admin Menu items?
  16. how to only add a top-level admin menu without it creating a sub-level-menu
  17. WP /wp-admin/admin-ajax.php produces 404
  18. Sort wp_nav_menu() by menu order
  19. Hiding Admin Page While Keeping Menu Expanded
  20. Wp menu add page link as custom empty link
  21. Missing Menus Structure
  22. show different admin menu to different user roles
  23. Navigation Menus Depth for specific menus
  24. Change name & menu_name for Profile in the default menu, w/o altering core files?
  25. Add column to pages table
  26. Change search results order for Admin -> Appearance -> Menus -> Pages -> View all
  27. WordPress menu not loading in the admin side appearence-> menu tab
  28. Programmatically add existing pages and subpages to Appearance Menu
  29. WordPress Plugin menu position overwrite other item
  30. Ad custom admin page like WordPress customizer [closed]
  31. Dynamic admin submenu
  32. Custom Menu Broken WP 3.8.1 Update
  33. Limit User Iinterface for Admin?
  34. In the Admin Dashboard, can I choose which sections to display?
  35. Rename menu items for All except super admin
  36. Admin top level menu, pointing to an external url
  37. WP admin style not refreshing
  38. enqueue script during add menu items means before save menu items
  39. In admin edit-menu screen, newly added menu items always go to the bottom of the list
  40. Additional navigation bar in header
  41. WordPress menu items automatically becoming empty custom links
  42. How to remove empty menu space when creating admin page without menu title using add_submenu_page
  43. How to work with a custom theme that someone else created before me? (details below)
  44. Restrict user to edit only edit a certain menu
  45. Roles see different top menu (nav menu)
  46. how to configure this type of menu
  47. how to create pages and link them to a menu
  48. Dashicons not showed for admin menu
  49. Menus not visible in Appearance after being registered
  50. How to separate sub-menu output and keep associated with parent
  51. How to create menu in Word Press 4.2.2?
  52. Appearance > Menus
  53. Removing menu item doesn’t get removed on edit post
  54. Customizing label/title output of admin nav_menu selecter
  55. Is It Possible To A Link To The Homepage From The Admin Sidebar?
  56. Create custom page and custom menu
  57. How to let the role “editor” to control the menu?
  58. Add custom fields to specific menus
  59. Rename Menu icon in Twenty seventeen theme
  60. Critical Error when editing menu
  61. How to avoid wp_nav_menu() ID conflict?
  62. Highlight parent menu item when child is not in menu
  63. Building a Sub-menu: Display Parent Category/Page’s Children When Viewing Children
  64. Output the aria-labelledby parameter for a nav menu child
  65. Hide menu items for visitors and filter based on role
  66. Why I can’t change the permalink of this page?
  67. Custom Walker for Walker_Nav_Menu
  68. Appearance -> Menu -> Menu Structure : Add plain HTML code as an element
  69. Replace menu permalink/hyperlink with only menu name/slug
  70. wp_nav_menu add some element to container
  71. get_search_form() doesn’t appear to take parameter into account
  72. Custom menu deletes itself
  73. Check if Page Already Exists in Menu
  74. Reuse a custom WordPress menu on another WordPress website
  75. Default WordPress menu content
  76. Add code to WordPress menu items by class
  77. how do i change the text under a navigation menu [closed]
  78. How do you add a around the second level of a Menu?
  79. Remove admin menu
  80. Creating menu and breadcrumb “sections” within WordPress 3 being used as a CMS
  81. Add custom class to li element which has children
  82. How to Show Different Menus to Logged in Users in WordPress [duplicate]
  83. Unable to get menu pattern using a walker
  84. Menu not adding the right items
  85. wp_nav_menu inside an object — how do I deal with fallback_cb?
  86. Walker_Nav_Menu creating too many closing tags?
  87. Custom menu including also primary menu items
  88. open menu link (PDF) in new tab not download
  89. twentysixteen child theme – responsive menu – ham icon button not working – Cannot read property ‘classList’ of null
  90. How to add Loginout to Sub-menu
  91. Admin menu hilighting wrong item for CPT
  92. show a hidden ul if li is active
  93. How can I make menu items into two seperate buttons with different functions?
  94. Different colors for navigation bar
  95. Eliminate menu collapse button on website
  96. Specifying Class style for Menu
  97. Convert HTML code to WordPress menu
  98. How to view menu and submenus in URL
  99. Custom navigation / menu output (walker?)
  100. How to change mobile menu (toggle) icon in WordPress – Full Site Editing?