The new export option introduced in Xcode 9 requires more specific configuration than previous versions, specifically adding a provisioning profile to the exportOptionsPlist file. Until an update is released to automatically detect this option, users must manually generate and configure the exportOptions file for the Xcode Archive step. This involves archiving the project, exporting the IPA file, copying the contents of the generated plist file, and pasting it into the Custom export options input in the Xcode Archive step. With this configuration, users can now successfully export their iOS projects on the Xcode 9.0.x bitrise stack.