title: Facebook SDK Error on Installing Cocoapods Objective-C
body: <p>After installing Facebook SDK via Cocoapods in my Objective-C app, hundreds of errors were appearing.</p>
  <p>Things like this:</p>
  <pre><code>Undefined symbol: protocol descriptor for Foundation._ErrorCodeProtocol
  Undefined symbol: method descriptor for Foundation._BridgedStoredNSError.init(_nsError: __C.NSError) -&gt; A
  Undefined symbol: associated type descriptor for Foundation._BridgedStoredNSError.Code
  Undefined symbol: base conformance descriptor for Foundation._BridgedStoredNSError: Swift.Hashable
  
  [...]
  </code></pre>
  <p>I lost hours and hours trying to figure out why this errors occurred, installed, re-installed and nothing.</p>
  <p><a href="https://i.stack.imgur.com/h6JPN.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/h6JPN.jpg" alt="enter image description here" /></a></p>