Problem: The client is encountering PHP deprecation warnings in the WPML plugin related to dynamic property creation and string variable syntax. Solution: We are aware of these issues and they will be addressed in the upcoming release of the WPML plugin. If you're experiencing this, we recommend waiting for the next update which should resolve these warnings.
Please note that this solution might be irrelevant if it's outdated or not applicable to your case.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 problem persists, please open a new support ticket.