Changelog of the fixed issues in Contao 4.12.6:
- #4076 Trigger a deprecation if an old `contao.localconfig` key is used (leofeyer)
- #4043 Fix BC for `TL_LANG.LNG` and `TL_LANG.CNT` (ausi)
- #4033 Fix some more PHP8 issues (aschempp)
- #3947 Remove the routing error log in breadcrumb module (aschempp)
- #3983 Fix array to string conversion in tl_layout (fritzmg)
- #3791 Add annotations that generating page URLs can throw an exception (aschempp)
About Contao 4.12
The first stable version of Contao 4.12 has been released on 15 August 2021 and is the successor of Contao 4.11. 4.12 has been updated until 14 January 2022, after which it was replaced by Contao 4.13.
