bro I do facing the same issue in my a50. after several tries it's not working at all not even reinstalling the app from play store too.just uninstall it all disabled package get enabled,before uninstalling disable system admin permissions for it

tq

I have done that but there is no change

u need to turn on those options in settings bro all models have those we been using those

in 2019 I tried you tube vedios..so I gone for billing it