Supply Stats API not working / {"jsonrpc":"2.0","id":0,"error":{"code":-32000,"message":"unknown initial allocation"}}

[silentresearch]

I tried to work with a private network - all went well - just the explorer doesn't work as it should...

Initial alloc was set in the genesis.json but the API call gets the following response:

{"jsonrpc":"2.0","id":0,"error":{"code":-32000,"message":"unknown initial allocation"}}