When i launch first configuration

When i launch first configuration in my local host computer , i received this message
what i must to do to resolve this problem
thx

Could you explain more clearly, what is the meaning of this:
On WAMP, XAMP, MAMP, you may try :
- root/mysql (it seems the one you tried)
- root/ (no password

what am i dining in configuration windows?
-root/mysql where is it? root is the name of folder or its mean that root !

Thank for answer,

I tried the second option
db user = root
db password = (leave empty)
and error massage change as follows
:incorrect value for 'Log file name', cannot write to such a file : check access rights
the value in log file is: ../files/logs/projeqtor_${date}.log

Thank for answer,
the first option is used actually in my configuration page and gave me an error message that i explained to you, so
I tried the second option
db user = root
db password = (leave empty)
and error massage change as follows
:incorrect value for 'Log file name', cannot write to such a file : check access rights
the value in log file is: ../files/logs/projeqtor_${date}.log