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Last updated by Shekhar Bhandari 11 months, 1 week ago.

Assigned support staff: Shekhar Bhandari.

Author Posts
June 28, 2019 at 5:32 am #4104533

eric lo

after login to backend, no matter where i click, quite often it leads to a page displaying:

Fatal error: Uncaught Error: Undefined class constant 'PAGE_SLUG_SETTINGS' in /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/utilities/admin/class-wpml-admin-url.php:7 Stack trace: #0 /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/upgrade/commands/class-wpml-upgrade-display-mode-for-posts.php(83): WPML_Admin_URL::multilingual_setup(7) #1 /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/upgrade/commands/class-wpml-upgrade-display-mode-for-posts.php(29): WPML_Upgrade_Display_Mode_For_Posts->get_notice_content() #2 /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/upgrade/class-wpml-upgrade.php(146): WPML_Upgrade_Display_Mode_For_Posts->run_admin() #3 /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/upgrade/class-wpml-upgrade.php(134): WPML_Upgrade->maybe_run_admin(Object(WPML_Upgrade_Display_Mode_For_Posts)) #4 /home/ericl840/public_html/wp-con in /home/ericl840/public_html/wp-content/plugins/sitepress-multilingual-cms_old/classes/utilities/admin/class-wpml-admin-url.php on line 7

June 28, 2019 at 5:50 am #4104615

Shekhar Bhandari

Languages: English (English )

Timezone: Asia/Kathmandu (GMT+05:45)

Hello there,

Welcome to WPML support. I'd be assisting you further on this issue.

We recently released new versions of WPML plugins with fixes and improvements so could you please update the plugin to the latest version and let me know if this helps?


+ Make a backup (both files and database) for your site before updating/proceeding anything (Always a good practice!). You can use a plugin for this if you like. I often use the Duplicator plugin for this purpose. See:

Look forward to your reply.


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