This may be a compatibility issue. Please try the following steps after a full site backup{mandatory} and make sure you can access the site backend now.
1) Log in to the site root folder via FTP
2) Go to *wp-content/plugins* directory
3) Rename the *wpml-string-translation* folder to *wpml-string-translation-1*
4) Log in to the site dashboard. The above steps will help you to deactivate the WPML String Translation plugin and you will be able to access the backend.
Let me know the update. I will be happy to help.
Best Regards,
Prosenjit
The topic ‘[Closed] Fatal error: Uncaught Error: Undefined class constant 'CAP_MANAGE_TRANSLATIONS'’ is closed to new replies.