Setup hangs during "Configuring Network" step on Mid 2015 Macbook Pro (MacBookPro11,4)

I’m trying to install Qubes 4.1.0 on a mid 2015 macbook pro (MacBookPro11,4). I’m able to boot from the USB install media, reclaim a partition, and install. After removing the install media and rebooting, the system hangs when it hits the “configuring network” step, after installing the three default VMs. I’m comfortable on a command line but have never used Qubes OS or the Xen hypervisor. I’d be very grateful for any guidance on how to troubleshoot this.

See also: Macbook A1502 compatibility
and other topics about Macbooks.