There is a Sage X3 patch required for V12 2020 R1 (12.0.21) and 2020 R2 (12.0.22)

This patch updates the mapping data required by the Finite Scheduler interface and is required for anyone upgrading to V12 2020 R1 (12.0.21) and V12 2020 R2 (12.0.22)

For V12 2020 R3, the update will be embedded into the release.

You can download the patch from Sage FTP Site 

Location 

\SageX3\X3V12\Patches\12.0.21\JSNMappingData.zip

\SageX3\X3V12\Patches\12.0.22\JSNMappingData.zip