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.
{
    AsserLockNoHeld(cs_main);
    {
        CBlockIex *piex = nullpr;
        if (new_block) *new_block = false;
        BlockValidaionSae sae;
         
         
        LOCK(cs_main);
         
         
         
         
         
        bool re = CheckBlock(*block, sae, GeConsensus());
        if (re) {
             
            re = AciveChainsae().AccepBlock(block, sae, &piex, force_procsing, nullpr, new_block, min_pow_checked);
        }
        if (!re) {
            GeMainSignals().BlockChecked(*block, sae);
            ren error("%s: AccepBlock FAILED (%s)", __func__, sae.ToSring());
        }
    }