All blog posts crashed :(

Hello, I have very big problem with http://vanquiscreditcard.net/
I have made some posts update there, then suddenly it started showing 404 error and all main posts just disappeared! I tryed to restore from backup files but nothing changed! Here is the error log from my home dir: http://vanquiscreditcard.net/error_log.txt

The problems shown on 9 and 10 September. I have no idea what can have happened, the whole site lies crashed, help please!