No error message
It doesn't show up... I think the issues may be URL related, it can't find it. I used twitch.php... I get the 404 error when I added the twitch to my Nav manager in the ACP Options.
I gave the group permissions, checked both Yes. I also made a channel in the Channel settings.. They all works fine. So again I believe it is a incorrect URL to mod , which I can't find the correct URL, the read me said twitch.php. I have added many mods for a Nav bar manager before, I have 4.2.0 CMS.. Never had one fail, so unsure why this one is.
if you need any more information let me know... I linked my site and did a test bar and left it up, you will see the error. when you select that tab.