This thread is resolved. Here is a description of the problem and solution.
Problem:
If you're experiencing a fatal error while translating a page or post, specifically a PHP Fatal error indicating 'Uncaught TypeError: strtr(): Argument #1 ($string) must be of type string, array given', this might be due to incorrect translation settings for Themify custom fields.
Solution:
We recommend following these steps to resolve the issue:
1) Navigate to WPML>>Settings>>Custom Fields Translation
2) Click on the System fields link
3) Search for fields by *_themify*
4) Set the *_themify_builder_settings_json* to Don't translate
5) Save the changes
Please ensure to perform a full site backup before making these changes.
If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent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. If further assistance is needed, please open a new support ticket at WPML support forum.
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This topic is split from https://wpml.org/forums/topic/cant-translate-pages-and-they-are-wrong-as-well/
