Problem: The client reported that WPML is missing some records in the languages tables, which prevents it from functioning fully. The theme developers advised the client to clear language information and repopulate languages. Solution: If you have not yet made any translations, we recommend performing a WPML reset. This action is likely necessary due to a possibly corrupted installation, which could explain some of the issues you've encountered. Please ensure to back up your site before proceeding.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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. Should these steps not resolve your issue, please do not hesitate to open a new support ticket with us for further assistance.
