When configuring the list view web part, an attempt is made to set the Site URL of the list to something like https://www.example.com/, but when save is clicked on, the configurator automatically sets the URL to https:/www.example.com/ (notice one of the slashes is missing), and hence the list cannot be found. Some users would like to be able to use the absolute path since it is more straight forward.
TitleList View – missing slash when setting Site URL to absolute path in SSL environment
Fix the URL manually in the configurator.
Waiting for a fix in a future release.