[Eco Bounty] Balance display NaN in number field

Wallet Address [ioPay] : 0x385ba56abf3c15bad59887946acaf525cc7b44ad

Device & Enviroment :

• OS : Windows 11

• Browser : Microsoft Edge Version 138.0.3351.109

• Device model : Laptop Dell

Steps to Reproduce:

1. Go to: https://hub.iotex.io

2. Connect Wallet

3. Click Stake in the sidebar

4. In the Delegate List, click button Stake of any Delegate to open popup

5. Click tab NFT Bucket

6. Observe the content of tab

Actual Result:

after openi

ng tab, the text under Amount field was displayed [Balance: NaN IOTX]

Expected Result:

after opening tab, the text under Amount field should display [Balance: 0 IOTX]