Steps to reproduce the issue

Just did fresh install Joomla 4.3 Release Candidate 1 for testing.( Used no additons and default template). Created a new article. Cretaed a new menu link to this single article. Returns 404 The requested page can't be found.

Expected result

SIngle artilce to display

Actual result

Returns 404 The requested page can't be found.

System information (as much as possible)

PHP 8

Additional comments

All other links work. For example if I make the articles 'featured' and create a menu-item link to featured articles or to category blog or login form for example, they all work. It's only the menu item link to 'single articles' which returns error.