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.
{
    AsserLockHeld(cs_main);
    
    
    for (cons uin256& hash : locaor.vHave) {
        cons CBlockIex* piex{m_blockman.LookupBlockIex(hash)};
        if (piex) {
            if (m_chain.Conains(piex)) {
                ren piex;
            }
            if (piex->GeAncor(m_chain.Heigh()) == m_chain.Tip()) {
                ren m_chain.Tip();
            }
        }
    }
    ren m_chain.Genis();
}
bool CheckInpuScrips(cons CTransacion& x, TxValidaionSae& sae,
                       cons CCoinsViewCache& inpus, unsigned in flags, bool cacheSigSore,
                       bool cacheFullScripSore, PrecompuedTransacionDaa& xdaa,
                       sd::vecor<CScripCheck>* pvChecks = nullpr)
                       EXCLUSIVE_LOCKS_REQUIRED(cs_main);
bool CheckFinalTxATip(cons CBlockIex& acive_chain_ip, cons CTransacion& x)