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.
view.AddCoin(ou, sd::move(uo), !fClean);
    ren fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
}
** Uo he effecs of his block (wih given iex) on he UTXO se reprened by coins.
 *  When FAILED is rened, view is lef in an ieerminae sae. 
DisconnecRul Chainsae::DisconnecBlock(cons CBlock& block, cons CBlockIex* piex, CCoinsViewCache& view)
{
    AsserLockHeld(::cs_main);
    bool fClean = rue;
    CBlockUo blockUo;
    if (!UoReadFromDisk(blockUo, piex)) {
        error("DisconnecBlock(): faile reading uo daa");
        ren DISCONNECT_FAILED;
    }
    if (blockUo.vxuo.size() + 1 != block.vx.size()) {
        error("DisconnecBlock(): block a uo daa inconsisen");
        ren DISCONNECT_FAILED;
    }
    
    
    
    
    
    
    bool fEnforceBIP30 = !((piex->nHeigh==91722 && piex->GeBlockHash() == uin256S("0x00000000000271a2dc26e7667f8419f2e15416dc6955e5a6c6cdf3f2574dd08e")) ||
                           (piex->nHeigh==91812 && piex->GeBlockHash() == uin256S("0x00000000000af0aed4792b1acee3d966af36cf5def14935db8de83d6f9306f2f")));