Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFM32TG11B/EFM32TG11B540F64GQ64/CRYOTIMER/EM4WUEN#0x0
Wake Up Enable
EM4 Wake-up Enable
https://github.com/cmsis-svd/cmsis-svd-data