The culprit behind this issue is AdBlock, specifically the EasyList filter list that is automatically applied to AdBlock's filter sets.
Within this filter set, there is a rule that states: Block any resource with a URL that matches /adx
, except for domains adx.uk.com
or adx.wowfi.com
.
/adx.$domain=~adx.uk.com|~adx.wowfi.com
In this specific case, it is matching a portion of your domain name: http://adx
.000webhostapp.com/css/normalize.css
To identify all blocked resources, you can check the AdBlock tab in your browser's Developer Tools here.
How to resolve this?
The most effective solution is to contact the EasyList authors and notify them about the incorrectly blocked content. They recommend reaching out on their forum (no registration required).
Another approach is to host your resources (styles, scripts, images) on a different domain to avoid being filtered.
Alternatively, although not recommended, you could choose to ignore the issue or completely change your domain name.