title: MetaMask RPC error? 'MetaMask - RPC Error: Internal JSON-RPC error.'
body: <p>I'm developing the front-end to an application that I'm trying to test. However, MetaMask keeps giving me this error? I tried changing the gas limit like previously suggested and nothing. Any ideas?</p>
  <p>Error:
  MetaMask - RPC Error: Internal JSON-RPC error.</p>
  <p>code: -32603
  data: {code: -32000, message: &quot;gas required exceeds allowance (30000000) or always failing transaction&quot;}
  message: &quot;Internal JSON-RPC error.&quot;</p>