Enter a valid amount
Payout form shows payoutPage.errors.invalidAmount when the amount is empty, non-numeric, or otherwise invalid.
Why this happens
Client validation before submit — not the same as Amount exceeds available earnings (valid number, too large).
Diagnose and fix
1. Enter a positive amount using the expected format.
2. Stay at or below available earnings / minimum payout rules.
3. Refresh if the available balance just changed.
4. See Amount exceeds available earnings and Minimum payout amount.