Question

Hello, sorry for my bad English. My site is https://eberhard-koch.de/. I 
had a lot of work to make this page valid to html5 and css. When I check 
my pages with

https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.eberhard-koch.de/index1.htm

it is all fine but not with the site

https://eberhard-koch.de/subtexte/google.htm

(see the picture). I have over 90 what I called "subtexte", but the 
validator don't find "google.htm" but all the other pages. I cannot find 
any reason for this problem. Can you help me?

With kind regards

Eberhard Koch