The founder of the Calyx Institute and the CalyxOS Tech Lead have left the project and this means the signing keys are changing and everyone will have to re install once the new version comes out. Until then you just have to decide whether you are fine with a few months of no system updates. Once the new devs get their first release out you can most likely use the seedvault backup to easily switch.
You should have gotten a critical system notification after the last update which came out a few days ago. Have you not?
https://calyxos.org/news/2025/08/01/a-letter-to-our-community/
The founder of the Calyx Institute and the CalyxOS Tech Lead have left the project and this means the signing keys are changing and everyone will have to re install once the new version comes out. Until then you just have to decide whether you are fine with a few months of no system updates. Once the new devs get their first release out you can most likely use the seedvault backup to easily switch.
You should have gotten a critical system notification after the last update which came out a few days ago. Have you not?