Hey! So for ServerRewards RP the Command type isnt the best fit since it runs sr add through the server console and that doesnt always fire. Switch it to the Plugin type instead. Set Type to Plugin, then under Plugin settings put ServerRewards as the Plugin Name, AddPoints as the Hook, and 500 as the Amount. That calls the reward hook directly so the RP always gets added.
Oh also worth checking. If Inventory is enabled in your config then claiming day 4 doesnt give rewards right away. It drops them into the rewards storage instead, and the player has to open that inventory and click each item to actually receive it. For a Command reward the command only runs once they click it in there, so try flipping Inventory off if you want the RP added instantly on claim.