Changed Theme, but half of the pages are empty

So I have a fully working website, all set up and running well, but I wanted to change the theme I am using. The home page works fine, the product collection pages and individual product pages work fine, but when I want to create custom pages like for “About Me” page or “Artists” page or any other sort of custom page, the “default page” is empty as I think it’s still using the coding of the original theme.

Anyone know how to resolve this please?

Hi @tabs11 , welcome to the Shopify forum!

Is the new theme a 2.0 theme? are you creating this pages in the online store builder?
Sometimes it happens that the pages grab the style of the LIVE theme if the theme you are modifying is not LIVE. Have you tried setting this theme as LIVE?

Best,
Lanzi