Need to refrence the right DB.

lib/local_comms.js

@@ -340,7 +340,7 @@ function Database(){
         this.refreshEnv();
         debug("Getting the data for blockID: " + blockID);
         let txn = this.env.beginTxn({readOnly: true});
-        let data = txn.getBinary(blockID);
+        let data = txn.getBinary(this.blockDB, blockID);
         if (data === null){
             debug("Unable to get block at height: "+ blockID);
             return false;