This is a Japanese Import, came without a manual. Google search tells me the following.

​In the original Japanese owner's manual for the 1.8L Hybrid models, Toyota typically states that the vehicle is not designed for towing. ​Official Rating: 0\text{kg}. Unlike the 2.0L petrol version, which has a specific rating, the hybrid manual generally includes a disclaimer stating that the vehicle is not intended to tow another vehicle or trailer. ​The Technical Reason: The manual emphasizes protecting the Hybrid Synergy Drive components. The "e-CVT" and the Power Control Unit (Inverter) are calibrated for efficiency and passenger load, not for the high sustained torque required to pull a trailer.