Problem: The client was unable to update WPML because the site appeared unregistered, and attempts to re-register resulted in an 'Unable to parse data from service response' error. Solution: We recommended checking if the site or server's Firewall was blocking access to essential endpoints by following the instructions in this documentation: https://wpml.org/forums/topic/cannot-register-wpml-license-key-unable-to-parse-data-from-service-response/#post-14035759. If the problem persisted, we advised going to 'Dashboard -> Updates' and clicking the 'Check again' button.
The client's server administrator identified that the issue was related to the 'User-Agent: WordPress/6.4.3;' header in the request.
Please note that the solution provided might be irrelevant due to being outdated or not applicable to your case.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 still need assistance, please open a new support ticket in the WPML support forum.
