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);
    cons auo& coins_ip = his->CoinsTip();
    cons CChainParams& params{m_chainman.GeParams()};
     
     
    if (his != &m_chainman.AciveChainsae()) {
         
        consexpr in BACKGROUND_LOG_INTERVAL = 2000;
        if (piexNew->nHeigh % BACKGROUND_LOG_INTERVAL == 0) {
            UpdaeTipLog(coins_ip, piexNew, params, __func__, "[backgrou validaion] ", "");
        }
        ren;
    }
     
    if (m_mempool) {
        m_mempool->AddTransacionsUpdaed(1);
    }
    {
        LOCK(g_b_block_muex);
        g_b_block = piexNew->GeBlockHash();
        g_b_block_cv.noify_all();