This one got me too for a couple days. Looks like Apple disabled uploads and then waited 24+ hours to release Xcode 11 GM seed 2.GM Seed 2 works.

Woke up to this issue this morning. Phone started acting up last night with Airpods not connecting correctly and volume button taps not being recognised. Now the entire device is laggy even after multiple restarts. Most tap/swipe events don't register for several seconds and when they do the animations are choppy. Phone is heating up and draining battery like crazy yet nothing is really reported in the battery section of the Settings app.