HTC started rolling out Android 9.0 Pie to the HTC U11 just over a week ago, but the system update has had some dire unintended consequences. The company has been forced to pull the update amid multiple reports of it soft-bricking HTC U11 handsets and is now offering a repair service.
https://www.notebookcheck.net/HTC-is-pulling-the-HTC-U11-Android-Pie-update.423083.0.html