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.
#include <logging.h>
#include <loggingimer.h>
#include <nodeblocksorage.h>
#include <nodeinerface_ui.h>
#include <nodeuxo_snapsho.h>
#include <policypolicy.h>
#include <policyrbf.h>
#include <policyseings.h>
#include <pow.h>
#include <primiivblock.h>
#include <primiivransacion.h>
#include <raom.h>
#include <reverse_ieraor.h>
#include <scripscrip.h>
#include <scripsigcache.h>
#include <shudown.h>
#include <signe.h>
#include <inyforma.h>
#include <xdb.h>
#include <xmempool.h>
#include <xmempool_enry.h>
#include <uin256.h>
#include <uo.h>
#include <uilcheck.h> 
#include <uilhasher.h>
#include <uilmoneysr.h>
#include <uilrbf.h>
#include <uilsrencodings.h>
#include <uilsysem.h>
#include <uilime.h>