Can't grant full acess to MAC HDD (bigsur op.system)

Hallo to all,

i just bought Bitdefender and i need to grant full acess to HDD, but i will confirm, it asked me, if i need to restart app - yes, I do, and it asked me again to grant acess and it goes round and round..

Is there any solution? A previous antivirus worked fine

Thank you for help