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Oracle® Database 11g / 12c / 18c error codes ORA-00382: [string] not a valid block size, valid range [[string]..[string]]

ORA-00382: [string] not a valid block size, valid range [[string]..[string]]
Oracle Error Code: ORA-00382
Cause: 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.
Action: Remove corresponding parameter from the "init.ora" file and restart the instance.