@Jisami 

Hi, 
You can try the following steps and see if they help.

  1. Press the power button on the camera for three seconds to power it off, and remove the SD card from it if there is one.
  2. Press the power button on the camera for three seconds to power it on, and wait for two minutes.
  3. Press and hold the reset button on the camera for 10 seconds to perform a factory reset. Then, check the LED status on the camera. 
  4. If the LED is flashing red and green, you can try to reconfigure the camera in the Tapo app: How to set up the Tapo camera
  5. If the camera's LED does not change and the camera does not respond to the reset operation, you can contact your retailer or the local support team to check if the camera is under warranty.
 

Best Regards