Valet Not Found

I was trying to update the settings on the plugin, and it displayed this:

404 – Not Found

At the top, the browser said, “Valet – Not Found.”

This is a local install. The domain looks like this, “localhost/dmp/wp-admin/admin.php?page=wc-product-subtitle-settings&tab&ctab=wc_ps_general&settings-updated=true”