thanks @malikwqas
1. the robots.txt file is empty.
2. https://dealinspektor.de/ is the permalink of my home page
3. the ssl certificate is issued for: dealinspektor.de, https://www.dealinspektor.de via LetsEncrypt
Sorry, I dont know what to do?! Does this 301 redirect have impact on google indexability?
Besides there are the two 404s. For me it looks like they are remained of some deleted categories, right?
Can I manually delete them? How?
Thanks in advance