WordPress permalink structure is not set

I’m trying to generate my first static file. Right now, in Diagnostics, I’m down to one error still: In the WordPress box, under Permalinks, I get the message “WordPress permalink structure is not set”. Ok, so I’ve tried the various permalinks options in WordPress settings. This error only occurs when I use “Plain” (i.e. ugly) permalinks. When I use any other Permalinks option (Day and name, numeric, etc), the static file will not generate, and diagnostics will not run. It just hangs.

Any suggestions? I don’t care what my permalinks look like, I just want to resolve the error.