This thread is resolved. Here is a description of the problem and solution.
Problem:We want to show a hidden language but not saving, giving "Error: data not saved
Solution:We´ve found the culprit. Its a security plug-in that changes the backoffice url path, so the AJAX url wasn´t finding the php file. Deactivated this functionality to save the WPML setting and all good now.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.