There’s a minor error in GP 1.3.45 when saving a post or page. This only happens when you have WP_DEBUG set to true in your wp-config.php file.
Chances are, WP_DEBUG is turned off on your live set (it should be), and you’ll never notice this issue.
1.3.46 is set to be released in the morning, but has been delayed just in case any other issues pop up over night.
The error you might encounter looks something like this:
Notice: Undefined offset: 0 in ../wp-includes/capabilities.php on line 122
If you need this fixed immediately before 1.3.46 is released, here’s the beta: https://tomusborne.com/dev/temp/generatepress.zip
This plugin will help you install this new version over your current version: https://en-ca.wordpress.org/plugins/easy-theme-and-plugin-upgrades/
Simply save the above .zip to your computer (don’t extract it), and upload it to your site in “Plugins > Add New > Upload” with the above plugin activated.