Found issue with WPML Multilingual CMS, locks users from editing

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Supporter timezone: Europe/Zagreb (GMT+02:00)

Tagged: Exception

This topic contains 3 replies, has 0 voices.

Last updated by Dražen 1 week, 1 day ago.

Assisted by: Dražen.

Author	Posts
June 19, 2025 at 7:34 am
julieJ-6	Background of the issue: I am trying to edit my posts and pages using the WordPress editor and Elementor Pro editor. I have encountered issues that persist unless I deactivate the WPML Multilingual CMS plugin. I have two earlier tickets related to this issue: https://wpml.org/forums/topic/warning-message-unable-to-edit-pages-because-of-bug/ and https://wpml.org/forums/topic/i-have-a-previous-ticket-that-was-closed-with-a-bug-which-is-still-occuring/#post-17142040. Symptoms: I get an error message: 'Cannot modify header information - headers already sent by (output started at /var/www/inextia.dk/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/wpml/src/UserInterface/Web/Infrastructure/WordPress/CompositionRoot/Config/ExistingPage/PostEditPage.php:23) in /var/www/inextia.dk/public_html/wp-includes/functions.php on line 7168.' Questions: Why does the WPML Multilingual CMS plugin prevent me from editing posts and pages? How can I resolve the error message related to header information?
June 19, 2025 at 7:56 am
June 19, 2025 at 8:22 am #17149188
Dražen Supporter Languages: English (English ) Timezone: Europe/Zagreb (GMT+02:00)	Hello, I have further checked and escalated this issue to our 2nd tier. They will check and advise further, I will update you when I have some news. Note it may take a day or two. Regadrs, Drazen
June 19, 2025 at 9:10 am #17149471
julieJ-6	super, thank you, I will await further information
June 19, 2025 at 1:02 pm #17150735
Dražen Supporter Languages: English (English ) Timezone: Europe/Zagreb (GMT+02:00)	Hello, Thanks for the patience. We checked further and it seems it might be related to server issue / blockage of some files. On localhost I have reinstalled WordPress core and that fixed the issue and works fine. I have tried the same on your staging site but issue still happens. Video: hidden link Our 2nd tier support think that this blockage / missing files could be due to Conditional Serving by Host or WAF. I advise you to contact hosting support to check server log, disable any related security mentioned above or if possible that you try your website on another hosting / server, it should work fine there after re-install of WP core files. Regards, Drazen