Try clearing any server / plugin caches firsts.
Then rebuild permalinks by going to the Dashboard > Settings > Permalinks and hitting save a couple of times.
This generally happens because of broken permalinks. Try these options:
1. Disable the Cache Plugins and try the step i provided above.
2. Disable all other plugins to make sure nothing is conflicting.
3. Check with your Host if you’re on an Apache server, if so asked them about resetting your .htaccess file
I don’t think us looking at the backend will provide a solution.
Did you try disabling all the other plugins?
Can you backtrack to when the problem arose? What changed? Your host may have performed an update or change that broke the nginx equivalent of rewrite rules.
It does indeed look like your permalinks are broken.
If it’s not a plugin, you’ll likely need to contact your hosting to make sure the server is configured correctly. It’s possible that something was misconfigured causing the rewrites not to work anymore.