I wrote a slightly wrong thing and can't update or delete my previous post, so I'll write a more correct thing here...
For most of the supported phones, the Jan 10th (2023011000) release was moved to stable a few hours ago but the web installer is still trying to download the old stable release (2022122700) which is no longer available.
The error you're seeing is just the web installer throwing an error after trying to check the zip file before flashing.
If you don't want to wait and are feeling brave you can try the command line installer. Just download from the beta list.