After hours of installation no one is gaining any RP.  Their balance stats 0 points.

can someone help me with this?

{
"General Options": {
"Data save interval (seconds)": 900,
"Track player AFK time": true,
"Number of entries to display in the top playtime list": 10
},
"Reward Options": {
"Reward plugin (ServerRewards, Economics)": "ServerRewards",
"Playtime rewards": {
"Issue rewards for playtime": true,
"Reward interval (seconds)": 900,
"Reward amount": 15
},
"Referral rewards": {
"Issue rewards for player referrals": true,
"Referrer reward amount": 100,
"Referee reward amount": 50
},
"Custom reward multipliers (permission / multiplier)": {
"playtimetracker.examplevip1": 1.0,
"playtimetracker.examplevip2": 3.0
}
},
"Version": {
"Major": 0,
"Minor": 2,
"Patch": 2
}
}