@greymanic 

Based on what I am seeing you have a blank whitelist which will block all traffic and sites to the connected devices but right now it only is active between 00:00 am -01:00 am.  The Green is active, white is not active.  

@greymanic 

Okay so the first image Content restrictions.  Blacklist and Whitelist.  a Blacklist is a list of sites that are blocked.  A whitelist is the opposite a list of sites allowed.  A empty black list means nothing is blocked and an empty white list means nothing is allowed.  You have an empty whitelist so all traffic would be blocked during the access hours. 

On the 2nd  image the green means when the rule will be active and a white or blank square means it is in active.  For 12 to 5 am you want the squares green between 00:00 and 05:00

Click ok once complete then Save and reboot the router at that point the restrictions should work.