When trying to view the WooCommerce PayPal debug logs through the dashboard log viewer you will sometimes just get a blank file. 😢

This usually just means that the log file is too large to be displayed.

If you have access to the host via SFTP or SSH you can just grab the file directly (by default it will be located within wp-content/uploads/wc-logs/) or request that customer provide it (if it is for a support ticket).