Problem: If you're experiencing inaccessible pages in the WPML backoffice, such as 'Translation Dashboard', 'Translations', and 'Settings', and you notice a JavaScript error in the console related to minified React, this might be due to a known issue. Solution: We have identified and resolved the main issue by removing the '_wpml_icl20_migration_attempts' option from the WordPress wp_options table. To fix this issue on your site, you should execute the following query:
DELETE FROM wp_options WHERE option_name = '_wpml_icl20_migration_attempts';
(Replace 'wp_' with the actual table prefix of your site if it is different.)
This solution might be irrelevant if it's outdated or not applicable to your case.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 the issue persists, please open a new support ticket at WPML support forum.