need help with my leveling skript and scoreboard script
level system:

Code (Text):

1. variables:
2.     {level::%player%} = 1
3.     {max::%player%} = 10
4.     {xp::%player%} = 0
5.  
6. on chat:
7.     set message format to "&7[&a%{level::%player%}%&7] %player's prefix%%player's displayname%: %message%"
8.  
9. on death:
10.     if attacker is a player:
11.         add 2 to {xp::%attacker%}
12.  
13. every 0.2 seconds:
14.     loop all players:
15.         if {xp::%loop-player%} is higher or equal to {max::%loop-player%}:
16.             message "&aYou've leveled up to %{level::%loop-player%}%" to player
17.             add 40 to {max::%loop-player%}
18.             set {xp::%loop-player%} to 0
19.             add 1 to {level::%loop-player%}
20.  
21. on break of coal ore:
22.     add 0.5 to {xp::%player%}

with this script I get this error:
There's no player/console in a periodical event
scoreboard:

Code (Text):

1. every 1 second:
2.  loop all players:
3.   set title of loop-player's scoreboard to "&b&lBLOCKPLAY"
4.   set line 7 of loop-player's scoreboard to "&7&m--------------------"
5.   set line 6 of loop-player's scoreboard to "&bPLAYERS&7>%number of all players%"
6.   set line 5 of loop-player's scoreboard to "&bLEVEL&7>%{level::loop-player}%"
7.   set line 4 of loop-player's scoreboard to "&bRANK&7>%loop-player's prefix%"
8.   set line 3 of loop-player's scoreboard to "&bPING>&7%loop-player's ping%"
9.   set line 2 of loop-player's scoreboard to "&7&m -------------------"
10.   set line 1 of loop-player's scoreboard to "&bBlockPlay.cc"

and here I have the problem that level is <none> but in chat you can see your level