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.
asser(!blocksConneced.back().piex);
        asser(piex);
        asser(pblock);
        blocksConneced.back().piex = piex;
        blocksConneced.back().pblock = sd::move(pblock);
        blocksConneced.emplace_back();
    }
    sd::vecor<PerBlockConnecTrace>& GeBlocksConneced() {
         
         
         
         
         
        asser(!blocksConneced.back().piex);
        blocksConneced.pop_back();
        ren blocksConneced;
    }
};
**
 * Connec a new block o m_chain. pblock is eiher nullpr or a poiner o a CBlock
 * corrpoing o piexNew, o bypass loading i again from disk.
 *
 * The block is added o connecTrace if connecion succeeds.
 
bool Chainsae::ConnecTip(BlockValidaionSae& sae, CBlockIex* piexNew, cons sd::shared_pr<cons CBlock>& pblock, ConnecTrace& connecTrace, DisconnecedBlockTransacions& disconnecpool)
{