Described in this issue. As a consequence, SCDA can not be used on 2020 scenes at the moment.
"It will be fixed with the next SNAP release in the coming weeks." Apr 22, Marco Peters - SNAP development coordinator
Fixed in SNAP8.
However using SNAP8 requires using "Subset" instead of "BandSelect": https://github.com/GEUS-SICE/SICE/tree/SNAP8
Also, PPGC does not work in SNAP8 so, at the moment, the SNAP8 branch uses TPGC.
Described in this issue. As a consequence, SCDA can not be used on 2020 scenes at the moment. "It will be fixed with the next SNAP release in the coming weeks." Apr 22, Marco Peters - SNAP development coordinator