Our website grantandgreen.de ask us to update 3 plugins one of which was wp-livechat, immediately after this our site crashed with the pasted message from our website
Fatal error: Call to undefined function get_rest_url() in /homepages/25/d77035516/htdocs/wp-content/plugins/wp-live-chat-support/modules/node_server.php on line 585
Since then when ever I login I only get this message and cannot return to the dashboard and plugin section to resolve this issue.
Please advise us on how to resolve this issue.
wp-live-chat-supportto anything else, e.g.
disable.wp-live-chat-support. The plugin will be deactivated and you can log in to wordpress again. Then get a new developer.