Enable RDP LEVEL 1 On stm32L0 with a transition to Standby Mode Failed!!

[coffeeMaker]

I want to set RDP LEVEL1 TO my based battery device, I followed this link but seems not working

https://www.youtube.com/watch?v=f7vs0NwZPFo

it always needs a POR to load correctly the OB.

anyone has tried this out with stm32L0?