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.
{
                    {RPCResult::Type::OBJ, "", "",
                    {
                        {RPCResult::Type::STR_HEX, "txid", "The transaction id"},
                        {RPCResult::Type::NUM, "vout", "The vout value"},
                        {RPCResult::Type::STR_HEX, "scriptPubKey", "The script key"},
                        {RPCResult::Type::STR, "desc", "A specialized descriptor for the matched scriptPubKey"},
                        {RPCResult::Type::STR_AMOUNT, "amount", "The total amount in " + CURRENCY_UNIT + " of the unspent output"},
                        {RPCResult::Type::BOOL, "coinbase", "Whether this is a coinbase output"},
                        {RPCResult::Type::NUM, "height", "Height of the unspent transaction output"},
                    }},
                }},
                {RPCResult::Type::STR_AMOUNT, "total_amount", "The total amount of all found unspent outputs in " + CURRENCY_UNIT},
            }},
            scan_result_abort,
            scan_result_status_some,
            scan_result_status_none,
        },
        RPCExamples{
            HelpExampleCli("scantxoutset", "start \'[\"" + EXAMPLE_DESCRIPTOR_RAW + "\"]\'") +
            HelpExampleCli("scantxoutset", "status") +
            HelpExampleCli("scantxoutset", "abort") +
            HelpExampleRpc("scantxoutset", "\"start\", [\"" + EXAMPLE_DESCRIPTOR_RAW + "\"]") +
            HelpExampleRpc("scantxoutset", "\"status\"") +
            HelpExampleRpc("scantxoutset", "\"abort\"")
        },
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VARR});
    UniValue result(UniValue::VOBJ);