Problem:
When we try to access the backend of the site, this error appears:
Fatal error: Uncaught Error: Call to undefined method SitePress::postTranslations() in /........./wp-content/plugins/folders/includes/class-wpml.php:120
Solution:
The error is coming from another plugin, not WPML. As you can see in the error, the plugin directory is "/wp-content/plugins/folders/".
You can login through FTP and go to /wp-content/plugins then disable the plugin by renaming its folder to something else or contacting the plugin author to check the issue.
