Note5 Custom Binary block by FRP lock.

My Note 5 (N920c) is in a brick state at the moment. It is unable to boot up because of the error “Custom Binary block by FRP lock”. I have tried to factory reset the phone by going into the recovery mode but it won’t factory reset either.

When I put the phone in download mode and try to flash the stock image or any other image it fails via Odin. Using the latest version of Odin and the latest Samsung drivers for Note 5 on Windows 10.

I have tried everything in my power to resolve the issue but to no avail. Samsung support won’t help either because the phone apparently is rooted according to them.

Can you please assist me as my phone is completely useless. Thanks for the help in advance.