I’ve released AutoDMG 1.8.1, which includes the following bugfixes:

• Add App Transport Security exception for cdn-apple.com.
• Show a helpful error message when an incomplete installer is used.
• Better error messages when image building fails.
• Fail but don’t crash if a profile is bad.

You’ll find the download on the AutoDMG releases page. If you have questions or need help, you can join us in #autodmg on Slack MacAdmins (but please check the documentation and especially the FAQ first).