Wallet Troubleshooting

Your wallet is connected to a chain other than Polygon mainnet (chain ID 137). Polymarket runs entirely on Polygon.

1. Open MetaMask → top-left network selector → choose Polygon Mainnet.
2. If Polygon is not in the list, click Add Network → Polygon Mainnet. Manual values: Chain ID 137, RPC https://polygon-rpc.com, currency symbol POL, explorer https://polygonscan.com.
3. Refresh the market page and re-tap Place Order. The trade panel will also offer an auto-switch button — clicking it sends the standard wallet_switchEthereumChain request, which most wallets honor in one click.

A previous wallet popup is still queued and the wallet refuses to open a second one until you act on the first.

1. Click the MetaMask (or other wallet) extension icon to reopen its popup.
2. Reject or Confirm the stale request that's blocking the queue.
3. Refresh the market page. Re-tap Place Order. The wallet will now accept the new signing request.

Tip: if you see the stale request keep coming back, fully close the wallet popup and reopen it once — some wallets cache the queue across refreshes.

The approve transaction either ran out of gas, was front-run by a chain switch, or hit an allowance state already updated by another tab.

1. Verify your wallet is on Polygon Mainnet (top of MetaMask). If you switched chains mid-flow, the approve was sent to the wrong network.
2. Re-tap Place Order. The 1-click BUY flow re-runs the wrap → approve → submit chain automatically; you don't need to approve manually.
3. For neg-risk multi-outcome events (elections, sports brackets) the first BUY may show two wallet popups in sequence (CTFExchange + negRiskAdapter). This is normal — both allowances are required.

If failures persist, check your allowance on PolygonScan: search your wallet → ERC-20 / ERC-1155 token approvals → confirm pUSD + CTF allowance are MAX to 0xE111180000d2663C0091e4f400237545B87B996B.

Your gas price was below the current Polygon market rate at the time of submission. The tx sits in the mempool until either the gas market drops or you replace it.

1. Open MetaMask → Activity tab → tap the pending transaction.
2. Choose Speed up to resubmit at higher gas. Or Cancel to replace the nonce with a 0-value self-transfer that frees the slot.
3. Never bump the nonce manually — always replace the same nonce with higher gas. Changing nonces strands later transactions.

Polygon usually clears stale low-gas txs within 10 minutes on its own; if the value of the trade is small, waiting is often fine.

Polygon transactions require POL (the network's native gas token) to pay for execution. PolymarketTrade does NOT sponsor gas. Typical cost: ~$0.50 in POL covers a week of trading.

1. Buy POL on Binance, Coinbase, or any major CEX. Withdraw to the Polygon network — NOT to Ethereum / ERC-20.
2. Or use Relay (relay.link) for fast cross-chain bridging from any EVM source. Linked in the full setup guide.
3. Or use a Polygon-native fiat on-ramp like Transak or MoonPay (higher fees, faster for small amounts).

After POL lands in your wallet, refresh the market page. Trades execute immediately.