I am not able to enter/exit the parking. The reader shows “Invalid Status”. What does it mean and what should I do?

It means either the APCard is not active or there was an improper exit done by the driver before. An improper exit refers to exiting by tailgating too closely to the car in front, and as a result, failing to register the entry/exit on the reader.

What should I do?

Please visit APU cashier counter and report your issue.