Undefined function getAdminPanelUrlPrefix()'error in Laravel SaaS project after installing chatmessenger

Question

When I install the chatmessenger package in my Laravel SaaS project, I encounter an error:

Call to undefined function getAdminPanelUrlPrefix()

Below is the error I get in my code editor.

And this is the error I get on the browser:

I'm unsure of the cause of this issue. However, when I remove the syntaxlexx/chatmessenger package, the project functions correctly.