CiviCRM WordPress doesn't work suddenly
FIXED!

My issue was with the resource URL.

Update the following file: example.org/wp-content/uploads/civicrm/civicrm.settings.php

Approx. line 82: $civicrm_setting['URL Preferences']['userFrameworkResourceURL'] = 'https://example.org/wp-content/plugins/civicrm/civicrm';

I had put an SSL certificate on via my host (SiteGround), just before this issue started happening, which was messing it up.

All the paths need to have https: in them.

Shoutout to Jon G for his help and patience!