Qubes updater 4.2.1 crashes at start (index out of range)

[apparatus]

Dom0 update => Qubes Update no longer available

I ran an update this morning and tried running qubes update again and nothing happened. I also tried the command line ‘sudo qubesctl update.qubes-dom0’ and I get: ‘update.qubes-dom0’ is not available. DOM0 configuration failed, not continuing. Anyone else seeing this problem?