Sometimes some websites fail to load without the CSS or styling or website loads without formatting, and you see only white pages with text.

It could be the fault of the website or it could be a very slow connection or it could be just something else. :P

But if you keep seeing it for a particular site, do the following:

Carry out a Hard Refresh. Open your browser, press the Ctrl+F5 keys or, while holding down the Ctrl key, click on the Refresh button near the address bar.

See if this helps.