Problems with UIF and Nitrokey 3

Nitrokeys
1

Unable to disable UIF with Nitrokey 3.

gpg/card> uif 1 off
gpg: error for setup UIF: PIN blocked

Have verified that admin pin entered is correct (by using it to change the admin pin).

Firmware version v1.8.3, gpg (GnuPG) 2.4.8.