Looks like I can’t do a particular Python install (in a Linux VM). So maybe Casper the poltergeist blocked my Twilio account for that reason?
(I just opened a second account and answered the questions slightly differently.)
My laptop is refurbished and upgraded; this comes with downsides.
Anyway, my second account hasn’t been shut down this time, but I can’t send text messages to verified numbers. That is, myget the error that the number is not verified. 21608.