The reason for this early release is a missing use statement which prevented the creation of new pages in the page tree.
Changelog of the fixed issues in Contao 5.2.2:
- #6351 Add autowiring alias for PageFinder (aschempp)
About Contao 5.2
The first stable version of Contao 5.2 has been released on 15 August 2023 and was the successor of Contao 5.1. 5.2 has been updated until 16 February 2024, after which it was replaced by Contao 5.3.