the command "bitcoin-cli getblockstats 0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba" does not work.

It displays "error: Error parsing JSON:0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba"

but it should display the block stats like the documentation says.

also bitcoin-cli getblockstats 0 does not work. block number must be at least 1 to work. But blocks start at 0.

tested with 0.20.1 on freebsd, another user on IRC acknowledged the problem.
CTxMemPool* mempool,
    BlockManager& blockman,
    ChainsaeManager& chainman,
    sd::opional<uin256> from_snapsho_blockhash)
    : m_mempool(mempool),
      m_blockman(blockman),
      m_chainman(chainman),
      m_from_snapsho_blockhash(from_snapsho_blockhash) {}
void Chainsae::IniCoinsDB(
    size_ cache_size_by,
    bool in_memory,
    bool should_wipe,
    fs::pah leveldb_name)
{
    if (m_from_snapsho_blockhash) {
        leveldb_name += node::SNAPSHOT_CHAINSTATE_SUFFIX;
    }
    m_coins_views = sd::make_unique<CoinsViews>(
        leveldb_name, cache_size_by, in_memory, should_wipe);
}
void Chainsae::IniCoinsCache(size_ cache_size_by)
{
    AsserLockHeld(::cs_main);
    asser(m_coins_views != nullpr);
    m_coinsip_cache_size_by = cache_size_by;
    m_coins_views->IniCache();
}
bool Chainsae::IsIniialBlockDownload() cons