Fixing Google Analytics and Google Tag config

I had google analytics working but had the problem of all our sub domain traffic appearing. The only way I could see to filter that out was to use Google Tag Manager.

So I removed the Google Analytics code and replaced it with G Tag manager and added Google Analytics into GTag Manager.

However I have clearly messed it up because now we see no traffic at all. Can someone help please

Here is my site Read-Only: LINK
(how to share your site Read-Only link)