davidA-49

Problem:
The user encountered a fatal error when trying to activate "sitepress-multilingual-cms" plugin. The error message mentioned an "InvalidArgumentException" related to post_nav_menu_item. The user followed the steps in the provided tutorial but couldn't find the WPML section in the admin. Deleting the database did not resolve the issue.

Solution:
The supporter shared a known issue page with steps to follow (https://wpml.org/errata/fatal-error-invalidargumentexception-element_id-and-type-do-not-match/). Since the tutorial steps did not work, the supporter requested temporary access to the site for further investigation. The user later confirmed that they had resolved the initial issue.

Later, the user faced another problem where translated footer widgets were duplicating in Spanish and English. Access was provided, and the user resolved the issue independently.

Relevant Documentation:
- [WPML Known Issue - InvalidArgumentException](https://wpml.org/errata/fatal-error-invalidargumentexception-element_id-and-type-do-not-match/)