Problem:
If you're experiencing a fatal error (like the following) when attempting to add a translation using the Classic / WordPress editor, and the error message indicates a type error with
function where the second argument must be of type array but bool is given, this might be due to corrupt entries in your database.
Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, bool given in (...)/wp-content/plugins/sitepress-multilingual-cms/classes/menu-elements/class-wpml-admin-scripts-setup.php:143
Solution:
We recommend trying the following steps after ensuring you have a backup of your site:
1. Navigate to All Posts.
2. Change the language to French using the Dashboard language switcher at the top header.
3. Quick edit any single post and set it as a sticky post, then revert the changes. This action will create necessary entries in the database to potentially fix the issue.
4. Attempt to translate the posts again using the WPML Classic Editor.
This issue is related to known issues which can be found here:
If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. Additionally, please feel free to open a new support ticket for further assistance at WPML Support Forum.
