Clio 2 warning light electric and water pump symbol

Hello Clio Fans, I ask you to be familiar with this problem and model. At our Clio 2 campus year 2006 first lighted up after the great rain. But the car was mobile. Today the symbol for the water pump also lit up and the car suddenly slowed down. My wife stopped for five minutes and afterwards could carry the vehicle carefully home:-) I found that about 1.2 l of cooling water was missing. I marked the filling level and drove a round. The cooler temperature had remained constant, but this control lamp for the water pump still glows as before. The warning lamp for the electrics did not appear any more. At home the water level in the container had dropped about 2 cm. There is no leak on either a hose or on the ground. Now I am at a loss. Can someone please give me a hint where the cause of this error might lie? thank you