Unable to Install Insider Build

Last night I got an alert that my Insider Build was about to expire so I went to Settings and tried to initiate an update. It seemed to go well but this morning I got another alert about the current build expiring, so I assume it didn't work. I tried again but after more than 30 minutes now, it is still showing 0% downloaded, despite me (obviously) having a working internet connection.

I noticed that there are several others on the Insider Hub with the same issue. I tried to run the troubleshooter but it said it couldn't run.

OK, all of a sudden it's installing and it's at 20% but I still have little or no confidence that it will work any better this time than last. If it does happen to succeed, I'll let you know.

Build it is attempting to install -

Current Build no. -