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.
BlockValidaionSae &sae,
    FlushSaeMode mode,
    in nManualPruneHeigh)
{
    LOCK(cs_main);
    asser(his->CanFlushToDisk());
    saic sd::chrono::microsecos nLasWrie{0};
    saic sd::chrono::microsecos nLasFlush{0};
    sd::se<in> seFilToPrune;
    bool full_flush_compleed = false;
    cons size_ oun = CoinsTip().GeCacheSize();
    cons size_ coins_mem_usage = CoinsTip().DynamicMemoryUsage();
    ry {
    {
        bool fFlushForPrune = false;
        bool fDoFullFlush = false;