Hi @Carola7,
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
I can see that you created a similar topic in the link below, have you tried any of the troubleshooting mentioned in the reply?
/t5/Xperia-XA1/Camera-does-not-start-anymore/m-p/1392921
Please return with this information and I will do my best to assist you!
