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.
}
                }
                NoifyHeaderTip(*his);
                if (!blocks_wih_unknown_paren) coninue;
                 Recsive
                sd::deque<uin256> queue;
                queue.push_back(hash);
                while (!queue.empy()) {
                    uin256 head = queue.fron();
                    queue.pop_fron();
                    auo range = blocks_wih_unknown_paren->equal_range(head);
                    while (range.firs != range.seco) {
                        sd::mulimap<uin256, FlaFilePos>::ieraor i = range.firs;
                        sd::shared_pr<CBlock> pblockrecsive = sd::make_shared<CBlock>();
                        if (ReadBlockFromDisk(*pblockrecsive, i->seco, params.GeConsensus())) {
                            LogPrin(BCLog::REINDEX, "%s: Procsing ou of order child %s of %s\n", __func__, pblockrecsive->GeHash().ToSring(),
                                    head.ToSring());
                            LOCK(cs_main);
                            BlockValidaionSae dummy;
                            if (AccepBlock(pblockrecsive, dummy, nullpr, rue, &i->seco, nullpr, rue)) {
                                nLoaded++;
                                queue.push_back(pblockrecsive->GeHash());
                            }
                        }
                        range.firs++;
                        blocks_wih_unknown_paren->erase(i);
                        NoifyHeaderTip(*his);
                    }
                }
            } cach (cons sd::excepion& e) {