Same behavior on Android:

Sending NFT works, but message with 'Fiat conversions are not available at this moment' is displayed when attempting to send any token and MetaMask app closes

• Device: Pixel 6 Pro
• OS: Android 14
• MM version: 7.36.0

I obtained the build from here

Present in RC 7.36.0 (1503):

In RC v7.36.0 (1501) from here

Before sending the ERC721 token:

• 3 NFTs imported on Sepolia network
• 1 NFT imported on Ethereum network

After sending the ERC721 token:

• MetaMask app closes
• Upon re-log in, the 3 NFTs on Sepolia network disappeared
• the Transaction List is not showing any activity
• the NFT on Ethereum network is still showing and message appears when trying to send it again:
  "You don't own this collectible".

Disabled 'Next' button bug is present in 7.37.0 (1506):

Also present in 7.37.0 (1508) - Android

Present in the latest main, Bitrise build.

Currently, a user's interaction with ERC-721 tokens is limited to merely opening the NFT tab. Subsequently, this action renders the option to send any token on Ethereum unavailable:

Present in the RC 7.38.0(1521):

In v7.38.0 (1523) the Next button is enabled, but unable to send ERC721 due to the following errors:

• intrinsic gas too low: gas 21000, minimum needed 21596 for Ethereum Mainnet
• intrinsic gas exceeds gas limit for Linea
• Internal JSON-RPC error for other popular networks

When trying to raise the gas limit and the gas fee, the transactions are failing

iPhone 15, 1523 build - 'Next' is disabled for ERC 721 send:

Cancel screen for ERC721 send:

In v7.38.0 (1524) the Next button is enabled, but unable to send ERC721 due to the following errors:

• intrinsic gas too low: gas 21000, minimum needed 21596 for Ethereum Mainnet
• intrinsic gas exceeds gas limit for Linea
  - Internal JSON-RPC error for other popular networks

For iOS, v7.38.0 (1524):

• "Next button" disabled for Ethereum Mainnet
• "intrinsic gas exceeds gas limit" error for Linea
• "Internal JSON-RPC" error for other popular networks

"Fiat conversions are not available" message and balance undefined - "Next" button disabled when attempting to send ERC20 token

I’ve investigated this issue but haven’t made significant progress yet. It appears to involve two distinct problems:

1. ERC-721 tokens cannot be sent in the send flow.
2. ERC-20 tokens cannot be sent in the send flow.

I agree with the Sev1 classification; however, I’m not sure this should block the 7.38 release as it is not technically a regression from the previous release, and has been present in production since at least version 7.34.

I have a very naive fix for the first issue (which I don’t believe is suitable for merging) but haven’t made substantial progress on the second. I don't have a ton of context regarding the send flow, which has been a challenge.

From what I’ve observed, the root cause seems to be that estimatedTotalGas is undefined in several places, which causes the send button to remain disabled. estimatedTotalGas is usually a state variable in the component, which is calculated here

Was there a recent change in how gas is calculated for sends in the TransactionsController? Could this be related to the estimateGasLimit function?

I noticed that we are now passing a networkClientId and I wonder if we should be passing a chainId instead.

On v7.39.0 (1529) iOS:

• The "Next button" is disabled for Ethereum Mainnet and Linea
• The MM app crashes when sending an NFT on another popular network. Despite this, the Tx is still successful:

On v7.39.0 (1529) Android:

• There is an error for Ethereum Mainnet described in this bug
  Despite this error, the Tx successful.

• The MM app crashes when sending an NFT on Linea or another popular network. Despite this error, the Tx successful.