I’m experiencing an issue with WooCommerce Multilingual (WCML). After updating the plugin to version 5.3.5, I continue to receive the following warning message in the WP admin area:
“WCML 5.2.1 and below requires compatibility mode to work.”
and a button to “Enable compatibility mode”, even though compatibility mode is already enabled.
Here a screenshot: hidden link
There are no older versions of WCML installed on the site, and there are no leftover plugin files in the filesystem. I have already tried the following steps:
- Cleared all caches (plugin, server, and browser)
- Toggled compatibility mode on/off
- Used the WPML → Support → Troubleshooting tools (clear cache, fix tables, remove ghost entries, etc.)
- Verified that only one WCML plugin exists and it is version 5.3.5
- tried locating files to delete in options: no file exists
Despite this, the warning persists.
It appears that the plugin is incorrectly detecting the WCML version or that an old compatibility notice is stuck and not clearing.
Could you please advise on how to remove this persistent notification, or confirm whether this is a known issue with WCML 5.3.5?
Our second-tier supporter has debugged this issue and found how to remove the notice. The solution requires deleting the wpml_notices key from the wp_options table. Alternatively, you can run the following query in the site's database.
UPDATE `wp_options` SET
`option_value` = '5.0.1'
WHERE `option_name` = '_wcml_version';
**** Important! Please make a backup of the DB before you proceed with those steps****
I was unable to use the WP PHPMYADMIN plugin on your site, so I could not do that for you. If you need help with this, please ask your WordPress developer, or maybe the support team at your hosting service can help.
Please let me know if you have any further questions.
