iOS Question Compiling issues


Licensed User
Hi there

Yesterday I started having issues compiling an app that previously was compiling without issue. I had no problem compiling for most of yesterday until near 16:00 where I started getting this error appearing in the compilation window.

Build system information
error: Missing private key for signing certificate. Failed to locate the private key matching certificate "iPhone Developer: [Username] (LW7DAS8DSN)" in the keychain. To sign with this signing certificate, install its private key in your keychain. If you don't have the private key, select a different signing certificate for CODE_SIGN_IDENTITY in the build settings editor. (in target 'B4iProject')

Build system information
warning: The iOS deployment target is set to 7.0, but the range of supported deployment target versions for this platform is 8.0 to 12.1. (in target 'B4iProject')

Error: ** BUILD FAILED **
any ideas on what the issue is?