Oracle Solution for Error ora-00382

ORA-00382: string not a valid block size, valid range [string..string]

What triggered the Error:

User specified a value for db_nk_cache_size where n is one of {2, 4, 8, 16, 32}, but nk is not a valid block size for this platform.

What should we do to fix it:

Remove corresponding parameter from the "init.ora" file and restart the instance.