This thread is resolved. Here is a description of the problem and solution.
Problem:
The client is experiencing a WPML error notice in the troubleshooting page in both their production and test environments.
Solution:
If you're encountering similar issues, we recommend the following steps after ensuring you have a full site backup:
1) Access your database using a tool like PHPMyAdmin.
2) Navigate to the wp_options table (note that your table prefix may differ).
3) Locate and delete the option keys
icl_admin_messages
and
wpml_notices
.
4) Clear all types of caches on your site.
If this solution doesn't seem relevant to your issue, please feel free to open a new support ticket by visiting our WPML support forum.
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.
This topic is split from https://wpml.org/forums/topic/wpml-configuration-completely-broken-without-our-intervention/