fix

src/main/java/au/com/royalpay/payment/manage/merchants/core/impls/ClientInfoCacheSupportImpl.java

@@ -30,7 +30,9 @@ public class ClientInfoCacheSupportImpl implements ClientInfoCacheSupport{
             signInAccountService.clearAccountCache(acc.getString("account_id"));
         }
         JSONObject client = clientManager.getClientInfo(clientId);
-        clientInfoCacheSupport.clearClientMonikerCache(client.getString("client_moniker"));
+        if(client!=null){
+            clientInfoCacheSupport.clearClientMonikerCache(client.getString("client_moniker"));
+        }
     }
 
     @Override