@Bram_Peddemors I presume you’ve moved the site, the error I see is “Site Not Found”.
Use the Deploy File Browser to see what files you’ve uploaded:
https://answers.netlify.com/t/new-feature-browse-files-in-your-deploy-with-the-deploy-file-browser/105196
Once you see what’s there, you’ll probably know what you need to change to fix it.