Getting Certificate ID's failed
After installing MacOSX El Capitan I'm getting now this error: "Getting Certificate ID's failed". We tried in two macs here. Are you getting troubles as well?

Looks like the compiled app doesn't work on El Capitan. I was getting the same error, so I recompiled the project using XCode on El Capitan, and now it seems to be working correctly.
I tried this (building and running the Xcode app on my Mac) and I still get the error.
I had this issue as well, clearing out the old Apple certificate from the System keychain seems to have fixed it here. http://stackoverflow.com/questions/35402862/this-certificate-has-an-invalid-issuer-keychain-marks-all-certificates-as-inv