Code assignments not coming up, just a white screen

i need assistance, i cannot finish my assignment screen is just blank
please see link:

It is hard to help without all relevant information. Add a link to your help request to the challenge you are doing. Mention the browser you are using also pls.

Hi my apologies for the delay. this is the link below.
https://learn.freecodecamp.org/responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document

I’m using safari, and i have just updated my pc to the latest version.

oh , then pls switch to chrome. Safari is notoriously unreliable for use with freecodecamp.

oh alright, i will download Chrome and if i have any challenges i will get back to you and the team