[FROG] Help with Key Chain encryption

I am running FRR 7.3 for RHEL 8 and implementing a key chain as follows: key chain ospf-1 key 1 key-string <MyPassword> cryptographic-algorithm hmac-sha-384 When I issue the 'cryptographic-algorithm hmac-sha-384' command, I get an error 'Validation'. If I use 256, it accepts the command but both 384 and 512 fail. How can I fix this? Thanks Rajen Patel