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.
{
    return DeploymentActiveAfter(pindexPrev, chainman.GetConsensus(), dep, chainman.m_versionbitscache);
}
template<typename DEP>
bool DeploymentActiveAt(const CBlockIndex& index, const ChainstateManager& chainman, DEP dep)
{
    return DeploymentActiveAt(index, chainman.GetConsensus(), dep, chainman.m_versionbitscache);
}
template<typename DEP>
bool DeploymentEnabled(const ChainstateManager& chainman, DEP dep)
{
    return DeploymentEnabled(chainman.GetConsensus(), dep);
}
/**
 * Return the expected assumeutxo value for a given height, if one exists.
 *
 * @param[in] height Get the assumeutxo value for this height.
 *
 * @returns empty if no assumeutxo configuration exists for the given height.
 */
const AssumeutxoData* ExpectedAssumeutxo(const int height, const CChainParams& params);
#endif