Touch stopped working after ultra install

I just followed installation instructions for the Ultra++ on RPi5 (latest Bookworm) with Waveshare DSI LCD touchscreen and following the reboot, touch is no longer working. Any suggestions as to why this happened and how to fix it would be greatly appreciated.

I don’t know what happened but the touch functionality has started working again. Maybe a loose connection somewhere? So please disregard my question. Thanks!