fetch meta fields inside a widget

I fixed this by adding: 

global $post;

More specific: I can’t explain why this works, that’s beyond my WordPress skills, but I added it right after the start of the query, so the code looks like this: 

<?php global $post; 
$loop = new WP_Query( array( 
'post_type' => 'kurs', 
'posts_per_page' => '5',
'meta_key' => 'dato',
'meta_value' => date('Y-m-d'),
'meta_compare' => '>=',
'orderby' => 'meta_value',
'order' => 'ASC'
 ) ); ?>

Related Posts:

  1. Widget: Custom Post Type Post Listing Dropdown on Admin Side
  2. Where to put my code: plugin or functions.php?
  3. Query all posts where a meta key does not exist
  4. Can the Next/Prev Post links be ordered by menu order or by a meta key?
  5. what is the correct way to compare dates in a WP query_posts meta_query
  6. Advanced search form with filters for custom taxonomies and custom fields
  7. Meta query with boolean true/false value
  8. Get post with multiple meta keys and value
  9. Correctly delete posts with meta and attachments [duplicate]
  10. Custom Post Type Data in Sidebar widgets?
  11. Storing revisions of metadata for custom post type
  12. Custom field values deleted when trashing custom post type
  13. How to get all custom fields of any post type
  14. Update CPT meta data using REST API
  15. Admin Area Custom Type Search By Meta Fields Without Title & Content
  16. Echo all meta keys of a custom-post TYPE
  17. Custom Post type – how to get checkbox to update meta field to null
  18. How can I filter posts by post_parent in the admin?
  19. How do I Paginate Search Results for Custom Post Types?
  20. Including Custom Post Types in “Recent Posts” Widget
  21. Ordering posts having multiple post-meta date fields
  22. Custom Post Type with Input fields to seperate table on database.
  23. Limit widget to a specific registered sidebar
  24. How do I remove all the metaboxes for a custom post type?
  25. Custom Queries: Joining On Meta Values From Two Custom Post Types
  26. Gutenberg how to make attribute to save to meta
  27. How to programmatically create a connection with [Plugin: Posts 2 Posts] on cpt publish?
  28. Post metadata deletes itself
  29. How to create a mini directory in WordPress?
  30. How Can I save multiple records in same meta key?
  31. Get all posts from custom post type and insert in select input as metabox
  32. Detect meta value changes when post is updated (post_updated)
  33. Search everything (posts, pages, tags, cpt, meta)
  34. Include custom post types in categories widget
  35. Permalinks using event date (year & month) instead of publication date
  36. Custom Post Type: Set post_title equal to a custom post type field
  37. I can’t set meta_key in my custom post type query
  38. Grossly inefficient wordpress loops!
  39. Compare 3 custom fields and sort by oldest
  40. Including a custom post type in the Archives widget
  41. How Do I Use WP_Query to Run This Database Query as Search Result?
  42. WordPress Admin Panel search posts with custom post meta values along with title
  43. Creating a custom post type upon registration
  44. How to Update post status using meta data in Custom post TYpe
  45. Rest Api v2 orderby meta_key in custom post type
  46. bulk Update post_meta with default values
  47. Reason action hook won’t work with update_post_meta from frontend form? Alternative?
  48. Can’t sort order of wp_query with 2 meta keys
  49. Showing Meta Data for Custom Post Types?
  50. How to get source of custom meta image?
  51. Having trouble with custom post type / meta box
  52. Query for posts from any post type but only add instock products
  53. How can I include meta box content when searching?
  54. update a post meta from a single table cell TablePress
  55. update custom post type meta from a shortcode
  56. How to embed form data within the ‘Add new post’
  57. Custom Meta Boxes – Nonce Issue – Move to trash issue
  58. Displaying Meta Box Image
  59. Custom post type category not displaying in custom post type
  60. How to make custom post meta wp_editor translatable?
  61. Automatically adding meta data to posts or multiple query help
  62. How to keep a check box in custom meta box for custom post type checked by default for add new post?
  63. How to add multiple featured image in meta box in post editor?
  64. Show metabox in custom-post-template depending on taxonomy term?
  65. ACF Upload Image in repeater from front-end with custom form? – add_post_meta()
  66. update_post_meta() whenever custom post type is updated
  67. Formatting custom meta box date from YYYY/MM/DD to a more readable alternative
  68. Trigger “unsaved changes” dialog for custom post meta changes
  69. Using date stored as custom field to filter posts displayed in admin
  70. Conditionally Query Custom Post Types by Post Meta for Blog Home Page?
  71. Displaying custom posts only if custom meta box’s date is not expired
  72. Displaying Metabox value (custom post type taxonomy)
  73. How do I sort a custom post type admin column using two meta keys?
  74. Add Post Url to Manage Edit Screen
  75. Add custom post types stats to a custom dashboard widget
  76. How to create another version of the Category widget?
  77. ‘Pages’ widget alternative for custom post types?
  78. Including Custom Post Type posts in a page template contextually (or should I widget?)
  79. How to best delete orphan wp_postmeta
  80. How can I display my custom metaboxes on a custom post template?
  81. Display all custom post type posts and order them by an optional meta_key
  82. Meta Box Only in CPT Edit Page, Not in Add New
  83. get_post_meta is returning image id
  84. Custom Post Type, Saving Multiple Checkboxes
  85. get_template_part() – post-meta not working?
  86. How can I get_post_meta() in the most efficient way?
  87. need advice on how to do a lists using custom post types – taxonomy vs postmeta
  88. Count posts with specific term_meta
  89. Custom search for custom post meta with pre_get_posts interferes with WP search
  90. Create a random unique 6 digit number as custom field for custom post type
  91. Export entries and multiple custom field meta to .csv?
  92. how to interconnect custom post types?
  93. WordPress Orderby Numeric Value Not Working
  94. Custom Post Status Transition Issues With Get Post Meta
  95. Replace title column in post list with post meta value
  96. right_now_content_table_end function not working?
  97. Metadata for a taxonomy – is there any WordPress way of doing this?
  98. My theme saves their custom post type’s metadata as a serialized array, how to access the keys?
  99. List all images from a single post meta value
  100. Does WordPress limit the length of slug names for Post Meta or Terms?