Cupra e-hybrid charging error at 230 V

Hello, I wanted to charge a normal Schuko socket today, but every time the charging stops after a few minutes with the supplied charger. Then the two lower lights flash on the charger, so something on the vehicle is not correct. Can anyone tell me what it is? What is on the back of the charger, as mentioned in the BA, does not help me (see Appendix). Greeting Stefan