To use the Splice integration in Ableton Live, you must have Ableton Live 12.3. The minimum system requirements for Live 12.3 are:
Mac: macOS 11.7.10 (Big Sur) or later
Windows: Windows 10 (version 22H2) or Windows 11 (version 22H4 or later)
On Windows, Edge WebView2 runtime must be installed: Click here to install
You can find the latest information about Ableton Live 12.3 here.
Please note, Splice has its own system requirements, but to use the Splice Ableton Live integration, you must be on one of the operating systems above.
The Splice integration will only work in Ableton Live 12.3. Older versions of Ableton Live will not have the feature.