Failure to download any software after install

This is a fresh install on an RPI3 that has previously (but not recently) run Dietpi.

When selecting anything in the software menu, when I go to install, I get a slight delay, then an error “Clearsigned file isn’t valid, got ‘NOSPLIT’ (does the network require authentication?)”

I can ping Google and

I also get this “NOSPLIT” error when trying to switch APT mirrors and running apt-get update as well.

I’ve tried a couple of time, over a few hours in case it was a problem with wherever it’s looking for updates and still no dice.

I’m not sure what the next step in troubleshooting is, though.

Quick follow up is that now, I no longer the this error and have moved on.

Were remote servers down for a few hours?

Mystical problems that won’t happen again?

Who knows?