Here are the steps you need to follow:
3. Select My car is blocked by another car.
4. Type the entire license plate of the car that is blocking your car. Then hit Next.
5. The app will show you to whom this car belongs to, or it can say that the license plate is not registered inside Tidaro. You could try to insert the license plate again, in case there was a typo. In either situation you can contact the parking administrator to solve the problem. This feature might vary from company to company, depending on its internal legal privacy policies.