Transaction builder JSON upload fails with no error

[jierlich]

Description

Upon uploading a JSON to the transaction builder, nothing visibly happens in the UI. The following error appears in the browser console

Environment

• Browser: Arc
• Wallet: MetaMask
• Safe: eth:0x9D3761A0fBdF80FD5E582377d411C3D6494B2399
• Environment:
  • production

Steps to reproduce

1. Go to any Safe
2. Go to the transaction builder
3. Upload a JSON (see example below)
4. See that nothing happened

transactions.json

File content:

{
  "chainId": "1",
  "transactions": [
    {
      "to": "0x4D9339dd97db55e3B9bCBE65dE39fF9c04d1C2cd",
      "data": "0xa9059cbb0000000000000000000000004d9339dd97db55e3b9bcbe65de39ff9c04d1c2cd000000000000000000000000000000000000000000000000000000000000000a",
      "value": "0"
    }
  ]
}

Expected result

JSON is uploaded and populated in the transaction builder

Obtained result

Neither success or error message displays on the UI

Screenshots