Wordpress wp-admin suddenly lost its style
<p>I'm really baffled about this. In the last couple of days (since I was using the site last), my Wordpress install has suddenly lost almost all of its formatting (only the top bar seems to work.</p>

<p><a href="https://i.stack.imgur.com/omdE1.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/omdE1.jpg" alt="enter image description here"></a></p>

<p>The CSS does seem to be loading, but its missing tons of them:</p>

<p><a href="https://i.stack.imgur.com/C9v9i.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C9v9i.jpg" alt="enter image description here"></a></p>

<p>Here is the same page on another site (same version of WordPress);</p>

<p><a href="https://i.stack.imgur.com/ZLh4N.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZLh4N.jpg" alt="enter image description here"></a></p>

<p>I'm at a loss as to what could be causing this all of a sudden. The front end if fine, just to reiterate that.</p>

<p><strong>UPDATE:</strong> thanks to someone over at <a href="https://wordpress.stackexchange.com/">https://wordpress.stackexchange.com/</a>, I followed these instructions:</p>

<blockquote>
  <p>Try the following: 1) Clear your browser cache. 2) Re-install
  WordPress (keep wp-content and your database, just reinstall the core
  files)</p>
</blockquote>

<p>....and that has now fixed it :) Thanks to everyone who offered suggestions though!</p>