Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAML11E14A/SysTick/SYST_CSR#0x0
SysTick Control and Status Register
SysTick enable
Tick interrupt
Clock source
Count flag
https://github.com/cmsis-svd/cmsis-svd-data