Okay, I managed to correct all validation errors. But I cannot correct the CSS ones as they are attributes that are necessary for the template. Besides, this site:
http://www.defx.de/
uses the same template, shows the same CSS errors and still works on my Google Chrome. I definitely cannot understand…
Now that is a mystery to me… I have Chrome in two different laptops and none of them are showing my webpage… Does anyone have any idea of what may be happening?