Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAML11E14A/NVMCTRL/ADDR#0x0
ARRAY=FLASH
Address
NVM Address Offset In The Selected Array
Array Select
0 (FLASH): FLASH Array
1 (DATAFLASH): DATA FLASH Array
2 (AUX): Auxilliary Space
https://github.com/cmsis-svd/cmsis-svd-data