recv() and getsync problems

My Arduino IDE wont communicate with my Arduino Nano. I have ATMega168.

I have Arduino on slovak but you i hope, that you will understand to that errorlog.
Help me to fix that please. :frowning: :frowning: :frowning: :frowning: :frowning: :frowning: :frowning: :frowning: :cry: :cry: :cry: :cry:

Your description lacks of useful information. Did you try to select correct MCU? BTW, are you sure it is 168, not 168P? ATmega168 has different signature so it cannot work correctly if this is a case. MCU type is defined in boards.txt.
Maybe, you could post the log, at least.