iOS 11 was introduced in mid October 2017, and may cause connectivity issues when an iOS device with an existing xavierwireless setup is upgraded.
To fix this, perform the following steps:
- On the iOS device, go to Settings >> General.
- Scroll down to the Profile section. If there is a "xavierwireless" profile listed here, remove it.
- Connect to the "xavierwireless" SSID.
- You will be prompted for a username/password. Enter your Xavier credentials.
- You will be prompted to accept/install a certificate. Accept/install the certificate to complete the setup process.