Do you know how to get into your code? If so check out theme.liquid or your main theme file. Look at the very top of this file and make sure it has . If you do not then add:
Make sure you download a copy of your store before any changes. From what I can see from the consol log is that your site is in Quirks Mode. This indicates that one or more documents within your webpage are being rendered in a compatibility mode that may not fully adhere to modern HTML and CSS specifications. Quirks Mode can result in unexpected layout and rendering behaviors due to legacy compatibility considerations.