updated error home link and copy on error page

pages/error.js

@@ -6,6 +6,7 @@ import Footer from "../components/footer";
 import Header from "../components/header";
 import { parseCookies, setCookie, destroyCookie } from "nookies";
 import { useSession, signIn, signOut } from "next-auth/react";
+import Router from "next/router";
 
 function Error({ statusCode }, props) {
     let { t, lang } = useTranslation();
@@ -34,16 +35,20 @@ function Error({ statusCode }, props) {
                                         : `An error occured`}
                                 </p>
 
+                                <p className="govuk-body">
+                                    {t("common:error-instruction-label")}
+                                </p>
                                 <a
                                     href={session != null ? "#" : "/"}
                                     className="govuk-link"
                                     onClick={() => {
-                                        destroyCookie({}, "pinsUser"),
-                                            window.localStorage.clear(),
-                                            session != null &&
-                                                signOut({
-                                                    callbackUrl: "/",
-                                                });
+                                        window.localStorage.clear(),
+                                            destroyCookie({}, "pinsUser"),
+                                            session != null
+                                                ? signOut({
+                                                      callbackUrl: "/",
+                                                  })
+                                                : Router.push("/");
                                     }}
                                 >
                                     Go back home