Hi,
I am trying to add analytics script to the header.
Forum is installed without any additional themes. On themes tab it shows “No Items”, on Components tab it shows “Default”.
I tried in “Default” components edit “CSS/HTML” and add script to “head” section, but it does not reflect that code on the forum…
Any thoughts?
Hello Andrew! Welcome here 
Are you trying to add Google Analytics or Plausible? If it is a different Analytics provider, you can use a theme component to include the Analytics code in the head part of your theme.
For info on theme components and how to create them, see here: Beginner's guide to using Discourse Themes as a primer.
If you are looking to add GA or Plausible, we have some topics on those already, see here: Setup Google Tag Manager for Analytics - howto / admins - Discourse Meta and Push custom events to Google Tag Manager and Analytics - howto / admins - Discourse Meta and Add Plausible Analytics tracking to Discourse.
I have the same issue. Under Themes it shows “No Items” so I cannot add any components to a theme because I dont seem to have one. I read the Beginners guide to using Discourse Themes, however there seem to be themes installed already. I dont have any.
To start off with a theme, you need to install it, have you tried doing that? Check out How do I install a Theme or Theme Component? for info on how to do that.
