That's the only way to publish a new version. You have no choice even it's a hotfix.
SonLe1106
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Which is your current version on AppStore? And Was your bundleID match with com.meshub.fluWebrtcApp both on AppStoreConnect and Apple Developer?
I guess you're not setting up email on your device. According to Apple document:
Before presenting the mail compose view controller, always call the the canSendMail() method to see if the current device is configured to send email. If the user’s device is not set up for the delivery of email, you can notify the user or simply disable the email dispatch features in your application. You should not attempt to use this interface if the canSendMail() method returns false.
if !MFMailComposeViewController.canSendMail() {
print("Mail services are not available")
return
}
So far as I know, you just allowed getting the latest version (and build number) of your app in AppStore.