I talked with the hosting company (Cloudways), and they told me that there is something going on with Cloudflare and I should contact them. That’s what I am doing now.
Now just to understand it a bit. What is the recommend way? I thought that it’s better to enable bot fight mode in the Firewall settings.
Is it recommend to enable it and that I do get Status code 503. In the browser it’s working fine, but maybe for SEO it’s not good that I do get such error.
It depends on what you need, but with the security layer you can have such challenges and they will return a 503. The 503 itself is not the issue though.