@IbtesamGul I’m not sure what you mean by “WordPress plugin” since Netlify has very ltitle to do with WordPress and you cannot host runtime PHP on Netlify.
The site that you have linked to is simply failing to load its assets:
Double check what files you’re deploying.
You can see what you did deploy on Netlify with the Deploy File Browser.
If you have a 'Build Command’ make sure you try running it locally.
Then check what files it puts into the folder you are using as your ‘Publish Directory’.
Netlify only deploys the files in your ‘Publish Directory’.
See: Build Configuration