title: "Warning: unable to build chain to self-signed root for signer" warning in Xcode 9.2
body: <p>I'm attempting to migrate an Xcode project to another computer. It gives me the warning "Warning: unable to build chain to self-signed root for signer" and when it runs it crashes immediately similarly to what is shown in this Stack Overflow:</p>
  
  <p><a href="https://stackoverflow.com/questions/48749912/app-working-on-simulator-but-not-on-iphone-dyld-abort-with-payload-dyld-dyld">App working on simulator but not on iPhone( dyld`__abort_with_payload dyld`_dyld_start)</a></p>
  
  <p>My issue seems similar to what is described on the Apple Developer Forums here:
  <a href="https://forums.developer.apple.com/thread/86161" rel="noreferrer">https://forums.developer.apple.com/thread/86161</a></p>
  
  <p>and similar to what is described on this Stack Overflow:
  <a href="https://stackoverflow.com/questions/47307416/xcode-ios-app-development-code-signing">Xcode ios app development code signing</a></p>
  
  <p>except the suggestions of deleting certificates and re-adding them, re-adding my account and restarting didn't seem to help. I have removed my developer cert for the second time and now I don't see it coming back, and I'm at a loss of knowing how to get it back since my dev portal doesn't appear to have a place to download it like it used to. </p>
  
  <p>I've also tried deleting the derived data folder several times. </p>
  
  <p>e: I've determined ANY project on this computer results in the same crash and warning.</p>