AH01626: authorization result of Require all granted: granted
It is not an error, nor is apache complaining about it. If you look closely at the log statement, it says:
[<date>] [authz_core:debug] [pid 10727] <stuff>Notice that there's authz_core:debug. It means that you have set the LogLevel directive to debug. Change the value to error or warn and you'll stop seeing the logged statement anymore.