404 Error on file uploaded

I’m using the plugin, and after uploap the file, I go to the wordpress admin site and click the link to the uploaded file and get 404 error, the link to the file includes the path to the file in the hard disk:

This it’s what I get with 404:

http://localhost/var/www/html/my-site/wp-content/uploads/umf/127/127_1_myfile.txt

This is the real path:

http://localhost/my-site/wp-content/uploads/umf/127/127_1_myfile.txt

How to fix this?

https://wordpress.org/plugins/woocommerce-upload-my-file/