Recently, some of our clients are experiencing iOS build issues. More about it can be found in this sticky thread
. The AppBuilder team is actively working on resolving the matter as soon as possible. Please, accept our sincere apologies for any inconvenience caused.
The good news is that we managed to stabilize our build servers and you should be able to execute an iOS build now. When we are able to share more details, or the issue is completely resolved, we will update the above forum thread accordingly.
Thank you for the understanding.