calling StateNetworkName fail when the nodes have not started to synchronize yet

[LinZexiao]

Checklist

• This is not a security-related bug/issue. If it is, please follow please follow the security policy.
• This is not a question or a support request. If you have any lotus related questions, please ask in the lotus forum.
• This is not a new feature request. If it is, please file a feature request instead.
• This is not an enhancement request. If it is, please file a improvement suggestion instead.
• I have searched on the issue tracker and the lotus forum, and there is no existing related issue or discussion.
• I am running the Latest release, or the most recent RC(release canadiate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.
• I did not make any code changes to lotus.

Lotus component

• lotus daemon - chain sync
• lotus miner - mining and block production
• lotus miner/worker - sealing
• lotus miner - proving(WindowPoSt)
• lotus miner/market - storage deal
• lotus miner/market - retrieval deal
• lotus miner/market - data transfer
• lotus client
• lotus JSON-RPC API
• lotus message management (mpool)
• Other

Lotus Version

Daemon:  1.17.0+2k+git.2830429+api1.5.0
Local: lotus version 1.17.0+2k+git.2830429

Describe the Bug

Calling StateNetworkName interface fail which from a node that connect to a 2k networke and haven't sync yet.
It will also fail when you want to get the genesis block by cmd of lotus chain get-block .

Logging Information

rpc     go-jsonrpc@v0.1.5/handler.go:279        error in RPC call to 'Filecoin.ChainGetBlock': cbor input should be of type array

Repo Steps

1. Run '...'
2. Do '...'
3. See error '...'
   ...