I can't seem to to resolve this.
I'm guessing the latest OS update messed something up (to 10.11.3).
Here's some logs
2016-02-04 01:05:05 +0000 /var/folders/hl/msj8911s7wzg_z259xv0mr_80000gn/T/XcodeDistPipeline.GIx/Root/Applications/MYAPPNAME.app/Contents/Frameworks/SVGKit.framework/Versions/A/Frameworks/libswiftAppKit.dylib: timestamps differ by 187 seconds - check your system clock
2016-02-04 01:05:05 +0000 /usr/bin/codesign exited with 1
2016-02-04 01:05:05 +0000 [MT] Proceeding to distribution step IDEDistributionSummaryStepViewController, context: <IDEDistributionContext: 0x7fa0ea55ffb0; archive(resolved)='<IDEArchive: 0x7fa0eb22c640>', distributionTask(resolved)='2', distributionMethod(resolved)='<IDEDistributionMethodDirectDistribution: 0x7fa0ea5a2940>', teamID(resolved)='team id here'>
Chain (5, self inclusive):
<IDEDistributionContext: 0x7fa0ea55ffb0; archive = '(null)', distributionMethod='(null)', teamID='(null)'>
<IDEDistributionContext: 0x7fa0e81c64c0; archive = '(null)', distributionMethod='(null)', teamID='(null)'>
<IDEDistributionContext: 0x7fa0ea392120; archive = '(null)', distributionMethod='(null)', teamID='(null)'>
<IDEDistributionContext: 0x7fa0eb64a860; archive = '(null)', distributionMethod='(null)', teamID='team id here'>
<IDEDistributionContext: 0x7fa0e7261980; archive = '<IDEArchive: 0x7fa0eb22c640>', distributionMethod='<IDEDistributionMethodDirectDistribution: 0x7fa0ea5a2940>', teamID='(null)'>
</IDEDistributionContext: 0x7fa0ea55ffb0>
2016-02-04 01:07:48 +0000 [MT] Canceled distribution assistant
I upgraded Xcode to 7.2.1 yesterday with no luck (this issue was happening before upgrading Xcode).