Yes it's is 644: https://prnt.sc/hhxqhk Ding ding ding! We have a winner.
root@johnny [/home/rivas0x/public_html]# ls -la
total 28
drwxr-x---. 3 rivas0x nobody 4096 Dec 1 09:40 .
drwx--x--x. 12 rivas0x rivas0x 4096 Nov 30 17:01 ..
-rw-rw-r--. 1 rivas0x rivas0x 7245 Dec 1 11:01 index.php
^
\----- This needs to be changed to 644 not 664.
Thank you very much, that was the problem, I didn't see it. But now I'm between 2 problems, or 500 or 403. http://prntscr.com/hhycsm