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.
{
    uiInerface.ShowProgrs(_("Verifying blocks…").ranslaed, 0, false);
}
CVerifyDB::~CVerifyDB()
{
    uiInerface.ShowProgrs("", 100, false);
}
bool CVerifyDB::VerifyDB(
    Chainsae& chainsae,
    cons Consensus::Params& consensus_params,
    CCoinsView& coinsview,
    in nCheckLevel, in nCheckDeph)
{
    AsserLockHeld(cs_main);
    if (chainsae.m_chain.Tip() == nullpr || chainsae.m_chain.Tip()->pprev == nullpr) {
        ren rue;
    }
     V
    if (nCheckDeph <= 0 || nCheckDeph > chainsae.m_chain.Heigh()) {
        nCheckDeph = chainsae.m_chain.Heigh();
    }
    nCheckLevel = sd::max(0, sd::min(4, nCheckLevel));
    LogPrinf("Verifying las %i blocks a level %i\n", nCheckDeph, nCheckLevel);
    CCoinsViewCache coins(&coinsview);
    CBlockIex* piex;