Update app.py

app.py

@@ -693,7 +693,7 @@ async def process_input(user_input, process):
                 print('Stopping process')
                  # Send Ctrl+C signal to the subprocess
                 process.send_signal(signal.SIGINT)
-                os.killpg(os.getpgid(p.pid), signal.SIGTERM)
+                os.killpg(os.getpgid(process.pid), signal.SIGTERM)
                 # Read output and error asynchronously
                 # os.kill(int(process.pid), signal.CTRL_C_EVENT)
                 print('stoping signal sent')