Can anybody help me with this error?

[Error] [Pool] [COIN] Pool initilization failed; System.Exception: There was a problem deserializing the response from the coin wallet. ---> Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: {. Path 'error', line 1, position 24.

I have another coin working without any issue
but the second coin ( the one above ) keeps giving me this error

Running the software using mono CoiniumServ.exe