Windows firewall logging. Log file is always blank

There are 3 profiles available (domain/private/public). You can view which is "active" on the top node "Windows Firewall with Advanced Security" of the MMC. Please ensure the profile that is active is the one you enabled and configure the firewall logging for. You can configure the settings the same for all 3 profiles or have a unique configuration for each.

In my case, it happened after promoting a Windows 2012R2 as a Domain Controller.

Adding the NT SERVICE\MPSSVC account with Full Controll permissions on the C:\Windows\System32\LogFiles\Firewall folder and restarting the server solved my problem.