# Troubleshooting ## **Issues on the Swap Page** ### **INSUFFICIENT\_OUTPUT\_AMOUNT** You're trying to swap tokens, but your slippage tolerance is too low or liquidity is too low. {% tabs %} {% tab title="Solution" %} 1. Refresh your page and try again later. 2. Try trading a smaller amount at one time. 3. Increase your slippage tolerance: 1. Tap the settings icon on the liquidity page. 2. Increase your slippage tolerance a little and try again. ![](/files/-MeTcJzq0K5hzefhCrAC) 4. Lastly, try inputting an amount with fewer decimal places. {% endtab %} {% tab title="Reason" %} **This usually happens when trading tokens with low liquidity.** That means there isn't enough of one of the tokens you're trying to swap in the Liquidity Pool: it's probably a small-cap token that few people are trading. However, there's also the chance that you're trying to trade a scam token that cannot be sold. In this case, VVS isn't able to block a token or return funds. {% endtab %} {% endtabs %} ### **INSUFFICIENT\_A\_AMOUNT or INSUFFICIENT\_B\_AMOUNT** You're trying to add/remove liquidity from a liquidity pool (LP), but there isn't enough of one of the two tokens in the pair. {% tabs %} {% tab title="Solution" %} **Refresh your page and try again, or try again later.** Still doesn't work? 1. Tap the settings icon on the liquidity page. 2. Increase your slippage tolerance a little and try again. {% endtab %} {% tab title="Reason" %} The error is caused by trying to add or remove liquidity for a liquidity pool (LP) with an insufficient amount of token A or token B (one of the tokens in the pair). It might be the case that prices are updating too fast when and your slippage tolerance is too low. {% endtab %} {% endtabs %} ### FerroRouter: EXPIRED > The transaction cannot succeed due to error: FerroRouter: EXPIRED. This is probably an issue with one of the tokens you are swapping. Try again, but confirm (sign and broadcast) the transaction as soon as you generate it. This happened because you started making a transaction, but you didn't sign and broadcast it until it was past the deadline. That means you didn't hit "Confirm" quickly enough. ### Transaction cannot succeed Try trading a smaller amount, or increase slippage tolerance via the settings icon and try again. This is caused by low liquidity. ### **Price Impact too High** Try trading a smaller amount, or increase slippage tolerance via the settings icon and try again. This is caused by low liquidity. ### Out of Gas error > Warning! Error encountered during contract execution \[out of gas] You have set a low gas limit when trying to make a transaction. {% tabs %} {% tab title="Solution" %} Try manually increasing the **gas limit** (not gas price!) in your wallet before signing the transaction. A limit of 200000-250000 is usually enough. Check your wallet's documentation if you aren't sure how to adjust the gas limit. {% endtab %} {% tab title="Reason" %} Basically, your wallet (Metamask, Trust Wallet, etc.) can't finish what it's trying to do. Your wallet estimates that the gas limit is too low, so the function call runs out of gas before the function call is finished. {% endtab %} {% endtabs %} ## **Other issues** ### Provider Error > Provider Error\ > No provider was found This happens when you try to connect via a browser extension like MetaMask or Crypto.com Extension, but you haven’t installed the extension. {% tabs %} {% tab title="Solution" %} Install the official browser extension to connect, or read our guide on connecting a [wallet](broken://pages/VzwLj5nM5go7WsEQ6c7s). {% endtab %} {% endtabs %} ### Unsupported Chain ID Switch your chain to Cronos Chain. Check your wallet's documentation for a guide if you need help. ### Internal JSON-RPC errors > "MetaMask - RPC Error: Internal JSON-RPC error. estimateGas failed removeLiquidityETHWithPermitSupportingFeeOnTransferTokens estimateGas failed removeLiquidityETHWithPermit " Happens when trying to remove liquidity on some tokens via Metamask. Root cause is still unknown. Try using an alternative wallet. > Internal JSON-RPC error. { "code": -32000, "message": "insufficient funds for transfer" } - Please try again. You don't have enough CRO to pay for the transaction fees. You need more native CRO in your wallet. ### Error: \[ethjs-query] > Error: \[ethjs-query] while formatting outputs from RPC '{"value":{"code":-32603,"data":{"code":-32000,"message":"transaction underpriced"}}}" Increase the gas limit for the transaction in your wallet. Check your wallet's documentation to learn how to increase gas limit. > Swap failed: Error: \[ethjs-query] while formatting outputs from RPC '{"value":{"code":-32603,"data":{"code":-32603,"message":"handle request error"}}}' Cause unclear. Try these steps before trying again: 1. Increase gas limit 2. Increase slippage 3. Clear cache ## **If you still have a problem** Contact us on [Telegram](https://t.me/ferroprotocol) or [Discord](https://discord.gg/V2957zMsmg) and we will do our best to get back to you. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ferroprotocol.com/support-and-help/troubleshooting.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.