First, just try to start the software without using a config file... pass the parameters in manually. Also, just start the thing with the most basic options, don't bother with all of that stuff you've got in your config file for now. For example:
./sgminer -k x13mod -o stratum+tcp://launch2.suchpool.pw:3362 -u beki.begi -p xxx
If that works, then the problem is in your config file.
Also, in your config file... why are some of your parameters quoted and others not? Example:
"intensity": "17",
"failover-only" : true,
Is it supposed to be that the boolean values are not quoted?
Of course, you should probably do what the error says and start it again with -T to get more details...