fix cannot read properties of undefined

[ilyar]

Description

If MetaMask selected BSC got Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'split') at fetchAccountDat

Refers/Fixes

#9701

Testing

The expected result is the absence of the specified error in the console if network is selected BSC in the MetaMask

[thelostone-mc]

codewise makes sense but @chibie do you reckon we need to tweak the economy / token model here along with this ?

[chibie]

@thelostone-mc no we don't but this PR doesn't fix the issue it references #9701 (even though the console error will cease) since bounty payouts with BNB are only supported via Binance Wallet not MetaMask.

[ilyar]

🤷🏻‍♂️