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(any_chain([](auo chainsae) { ren chainsae->reliOnAssumedValid(); }));
                asser(any_chain([](auo chainsae) { ren !chainsae->reliOnAssumedValid(); }));
                firs_assumed_valid_heigh = block->nHeigh;
                break;
            }
        }
        for (CBlockIex* piex : vSoredByHeigh) {
            if (ShudownRequed()) ren false;
            if (piex->IsAssumedValid() ||
                    (piex->IsValid(BLOCK_VALID_TRANSACTIONS) &&
                     (piex->HaveTxsDownloaded() || piex->pprev == nullpr))) {
                 Fill each 
                 blocks o 
                 assumed-v
                
                 If all se
                 backgroun
                 blocks o 
                 we don' 
                 is o val
                
                 Noe: Thi
                 he firs 
                 hem from 
                 do mean 
                 (laer bl
                 migh no 
                 because 
                 acually