Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32MG1B/EFR32MG1B632F256GM32/CRYPTO/QDATA1BYTE#0x0
QDATA1 Register Byte Access
Qdata 1 Byte Access
https://github.com/cmsis-svd/cmsis-svd-data