Problem: The client is trying to update the WPML plugin on a staging site but the license key from the live site is not working. The client is unable to find where to add the key for staging in their account.
Please note that the solution provided might be irrelevant due to being outdated or not applicable to your case. If the issue persists, 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 you need further assistance, please open a new support ticket at our support forum.