remove non-working interests, enhance error messages, update tasks & changelog

src/views/HelpView.vue

@@ -285,6 +285,11 @@
           and you may have to close all your tabs. In addition, it may be running as an
           installed app, so look for any Time Safari app that may be running outside a browser.
         </li>
+        <li>
+          There may be a problem with your identity. Go to the Identity
+          <fa icon="circle-user" class="fa-fw" /> page, then "Advanced", and "Switch Identifier"
+          and you may see helpful info there. If it shows a problem, try adding your identifier again.
+        </li>
         <li>
           It can help to reregister the service worker:
           <ul>