Problem: When trying to translate products with WooCommerce Multilingual, the following error appears:
An error of type E_ERROR was caused in line 124 of the file ......./wp-content/plugins/sitepress-multilingual-cms/classes/xliff/class-wpml-tm-validate-html.php
Error message: Uncaught Error: Call to undefined function mb_ereg_replace_callback() in ......./wp-content/plugins/sitepress-multilingual-cms/classes/xliff/class-wpml-tm-validate-html.php:124
Solution: The 'Multibyte String' PHP extension was not being enabled on the server. We recommend that you contact your hosting support and ask them to enable the 'Multibyte String' PHP extension. This extension is necessary for WPML to work properly. Please check the WPML’s Minimum Requirements. For more information on the 'Multibyte String' PHP extension, you can visit the PHP manual at https://www.php.net/manual/en/book.mbstring.php. If this solution doesn't look relevant, please open a new support ticket in our forum at https://wpml.org/forums/forum/english-support/.
Problem: After installing the WPML Multilingual CMS plugin, the site admin panel stops working and displays a critical error. The error message indicates that the class 'DOMDocument' is not found, which is part of a PHP extension that may not be enabled on the server. Solution: If you're experiencing a critical error after installing the WPML Multilingual CMS plugin and the error message mentions that the 'DOMDocument' class is not found, we recommend checking if the PHP XML extension is enabled on your server, as the 'DOMDocument' class is part of this extension. A similar issue was resolved by another client, and you can follow the steps provided in this thread: https://wpml.org/forums/topic/fatal-error-when-trying-to-access-installed-plugin/#post-12615561.
