This thread is resolved. Here is a description of the problem and solution.
Problem:
The client was unable to open the WPML editor and encountered a WordPress Critical Error message due to PHP warnings and deprecated function notices related to the WPML plugin.
Solution:
We recommend the following steps to resolve the issue:
1. Navigate to WPML > Settings > Custom Fields Translation.
2. Search for _themify fields within system fields. You will find that _themify_builder_settings_json is incorrectly set to 'translate'.
3. Change this setting to 'do not translate'. This adjustment resolved the issue on a staging site.
For new posts or pages, you should now be able to proceed with translations. For existing ones, please delete or cancel the existing translation job and try again.
If this solution does not resolve your issue, or if it seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix,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 problems persist, please open a new support ticket.
This is the technical support forum for WPML - the multilingual WordPress plugin.
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