If a bin is not moved from the port, the LED lights start blinking and you hear a warning signal, there is most likely an obstruction in the port that needs to be addressed.
Try these steps to solve the issue
For safety, make sure that the red error light above the "Retry" button is lit. The port will not move until the Retry button is pressed, so it is safe to handle the bin while the error light is on.
Remove any visible obstacles in the port and align the bin as needed.
Press the “Retry” button on the port to initiate another attempt at moving the bin.