Why does the response from the server come as a solid line

Question

PHP

System version: OS X 10.9.3 (13D65)
MAMP PRO is installed, with frequent frequency the site is loaded like this

Answer 1

Not sure if it's gzip.

Answer 2

I would suggest looking at this answer somewhere that can display the entire line correctly, not just display the questions on a black background. Perhaps, according to the data, it will first be possible to determine what exactly comes