Build a Product Landing Page Img Src error

I am getting these errors although the code clearly has them:

Your #header-img should have a src attribute.
Your #header-img’s src value should be a valid URL (starts with htt).

<nav id="nav-bar" class="flex">
      <img 
        src="https://cdn.freecodecamp.org/testable-projects-fcc/images/product-landing-page-logo.png"
        id="header-img" 
        alt="logo"
      >
      <div class="nav-link-div flex">
        <a class="nav-link" href="#features">Features</a>
        <a class="nav-link" href="#video">How it Works</a>
        <a class="nav-link" href="#pricing">Pricing</a>
      </div>
    </nav>