/:slug not making the site css load properly

Need Help
#1

if i load a page like https://abc.com/product it is loading completly no problem

https://abc.com/assets/css/styles.css like that and loading correctly

but if i load the website with slug https://abc.com/product/:slug

https://abc.com/product/gaming-chair
using builder plugin details information it is loding the data from model but all css changed like this

https://abc.com/product/assets/css/styles.css it returns 503 error and page not loading

i cleared the cache, cookies and view, config and cache from server as well still same issue

#2

what is your HTML/Twig code to load your CSS styles ?
the issue is there most likely.

it should look something like

<link href="{{ 'assets/dist/css/app.css' | theme }}" rel="stylesheet" />