Version 2.73 no longer allows to "continue without WiFi" when prompted if I am not on a WiFi network. Clicking the option just refreshes the screen with the same prompt options. This always worked perfectly prior to this newest version.
Have closed all option apps on phone and tried, have also shutdown iPhone and rebooted it and tried, have also reset network settings and tried. Same issue for all three of those, the option to continue cannot be selected or used.
We've made a fix available in 2.73.1 build 2 available now on TestFlight. If you want to help confirm that it fixes the issue on your iOS 18 devices, please install the TestFlight app from the App Store on your device and then click the link in the post to join the beta testing program for App Inventor.