it has a sticky handbrake switch
usually a sticky switch on handbrake, had any welding recently ?, worn shoes ?
your switch that tells the car that the brake is off is defective
Either the switch (on the handbrake) is sticking or you have a short circuit, usually caused by corroded wires or connections.
Either your handbrake switch is broken and will not turn off or you have low brake fluid.
Because the switch has either failed or come off it's mounting. There is an outside chance, if there has been work around the handbrake lever/centre console, that the switch wires might have become trapped and could be shorting out.
To stop the handbrake alarm in your VW Polo, ensure that the handbrake is fully disengaged. If the alarm persists, check for any issues with the handbrake switch or sensor, as they may be malfunctioning. If needed, consult the owner's manual for specific troubleshooting steps or visit a mechanic for a thorough inspection.
Remove the plastic cover from the puma handbrake. There is an adjustment nut under the cover that tightens up the brake.
The handbrake light is also the 'low fluid' warning light. It is connected to the handbrake as that ensures that it is checked every time you use the handbrake. If it remains on all the time, then check the brake fluid and top up if required. If the fluid is ok then it is probably the switch on the lever and is adjustable.
under the handbrake
under the handbrake
There is an adjuster under the car just under where the handbrake lever is.