If you added Robinhood Chain to your wallet through MemeWarzone before October 14, it may use an old RPC address that now fails often. Balances and transactions can then error.
When this applies to you, MemeWarzone shows an Update Robinhood Chain notice once per session. Press Update and confirm once in your wallet. You can also set the network's RPC to https://rpc.mainnet.chain.robinhood.com in the wallet's network settings.