Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l0/STM32L052/NVIC/IPR0#0x0
Interrupt Priority Register 0
priority for interrupt 0
priority for interrupt 1
priority for interrupt 2
priority for interrupt 3
https://github.com/modm-io/cmsis-svd-stm32