Zendesk to Salesforce Integration Error

I’m currently trying to set up the Zendesk to salesforce integration and I've run into a problem. I followed the guide Setting up the Zendesk for Salesforce integration – Zendesk help but when I drag and drop the “ZenDesk_Ticket_View” LWC I get the error “Your browsing session has ended or is invalid. Please re-login to Salesforce.com again.”, but my connection to salesforce is fine. Has anyone else had this problem and know how to fix it? 

This is the error I get when I drag and drop the ticket lwc on the edit page. I've freshly reinstalled and double checked all settings but nothing seems out of place.