Hi guys, had the same issue with my A56 couple days ago. Tried everything including resetting the device.Only solution which was quite simple, is to allow all permissions to Onedrive and Samsung Account under Apps>System Apps

Nothing worked until I went to Settings > Apps > System Apps and then granted all permissions to Onedrive and Samsung Account 

No update available in Galaxy store. Tried clearing the cache in settings for Samsung account but couldn't delete the data.Problem still persists.

Ok let me try that quick and get back to you 

I have the same query. Purchased my new handset on 1st Dec and redeemed on the app and received a confirmation email. But no update since then