Thank you so much for the reply!
I didn't realised that I have so much errors on my blog!
I tried to correct the HTML errors, but mostly I don't really understand what they mean. And if I recklessly change something I'm afraid it get worse.
also about "<body class="loading">TEMPLATE ERROR: b:include has no 'name' attribute" I can find it at the validation website, but I can't find this html in the template in blogger to change/remove. Super strange.
Also I'm getting more bugs at blogger now. I can't even open my preview, it gives an error if I do that.
Do you maybe any programmes that check up the errors and also automatically correct them? I am a noob at HTML, I don't know anything about it.. So that would be the only solution to correct my blog I think.