OyvindG-2

Problem:

I can see this error in the admin:

WPML can't run normally. There is an installation or server configuration problem. Show details

AJAX Error: error [403]
URL:https://ra-tls.com/wp-admin/admin.php?page=sitepress-multilingual-cms%2Fmenu%2Flanguages.php

I also can't save any settings in WPML. For example, I want to make a CPT translatable, but when I check this off, it doesn't save the setting.

Solution:

The client reported the following on how the issue was solved.

I have tested deactivating theme and plugins and now activated them again. The error is gone. The problem was the PHP version - reverted to 8.0, and the error is gone.

**** Important! Please make a full site backup (files and DB) before you proceed with those steps****

For your information, we have a few known issues with PHP version 8+. You can read about them here.

https://wpml.org/errata/elementor-and-php8-when-saving-a-page-there-is-php-fatal-error-uncaught-valueerror-mb_strpos/

https://wpml.org/errata/php8-fatal-error-uncaught-typeerror-array_diff-argument-2-must-be-of-type-array/

https://wpml.org/errata/elementor-php-8-fatal-error-uncaught-typeerror-json_decode/