Fatal error Call to undefined function

the first one thing, my english stincks, second, ¡hi all there!.

I getting a problem that haves me thinking about suicide…

this evening i was making some changes on a webpage (im the manager) and when i try to disable and re-install the plugin wp backery visual composer, i get this damned error:

Fatal error : Call to undefined function vc_is_page_editable() in /home/jemcl/public_html/fundacionchilemejor.cl/wp-content/plugins/revslider/revslider.php on line 156

i can´t change nothing from my wp-admin page, i try to reinstall the plugin (wp backery visual composer and revslider) flom filezilla, but i wave no sucess, PLEASE HELPME!!


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