Fix error on token number input

[tantely-klaytn]

Proposed changes

• Fix the error message showed when a user insert a number of token to send

Types of changes

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• [x] Bugfix
• [ ] New feature or Enhancement
• [ ] Others

Checklist

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Related issues

35

Further comments

[0xxlegolas]

Token transfer is not successful in this PR.

If I refresh and try again

@tantely-klaytn Please look into this.