Update app.py

app.py

@@ -216,7 +216,7 @@ def get_my_chain_send(sender_name=None,prev_block=None):
     try:
         r = requests.get(f'{main_balance}{sender_name}.json') 
         #print (f'r={r.text}')
-        mychain_send = MyChainSend(chain_load=main_balance,prev_block,load=r.text)
+        mychain_send = MyChainSend(chain_load=main_balance,prev_block=prev_block,load=r.text)
         response = {'chain': mychain_send.chain,
                 'length': len(mychain_send.chain)}
         #print (f'response={response}')