Hello DJ, I have the exact same problem. In my case, I previously installed WP and was using the administrative console without any issues.
Now when I go to my website domain, the website/wp-admin link throws a 404 error. This is where I would have logged in previously to make site changes. I thought that perhaps the login URL changed somehow, but I am not seeing that to be the case elsewhere in the support blogs.
I did notice recently that I received a notification that my site automatically updated to WordPress 5.6.6, I am not sure if this is the root cause. My site is hosted with GoDaddy and I am not aware of any changes on their side.
There are a few reasons that could be happening, and ways to fix them. First, the latest version of WP is 5.8.2, so it should be updated past 5.6.6 as soon as you can get into your Admin panel. Here are some things to try:
1. Check with GoDaddy support. They can likely diagnose and resolve the issue for you. If you’d rather try it on your own, try:
2. It could be a plugin conflict. If you can FTP into your site, go to wp-content folder. Change the Plugins folder name to something like Plugins-2. See if that resolves it.
3. Delete the .htaccess file. It’s a hidden file in your main WP directory, so you’ll need to select View Hidden Files in whatever FTP app you’re using.
4. Look at your wp-config file (download the file first as a backup). Paste this code in that file: