I don’t know it it’s the same issue or a separate issue: I have made all the updates that you listed, and can’t access wifi anymore . Any call to the library becomes blocking, for example, running the wifi scan sketch given as part of the tutorial freezes on the line "WiFi.mode(WIFI_STA).
I have tried installing a new computer to make sure that it’s not a library conflict, and tried erasing and flashing the RTL8720 firmware again, but wifi access still does not work. Unfortunately, I can’t recall the exact library changes that I made since last week, when wifi access from the sketch was fine. I assumed that something had gone wrong with my terminal, so I ordered a new one this weekend.
Could there be an issue with the latest firmware/libraries ?