I’m having the same issue. It just freezes at “WiFi.mode(WIFI_STA);”.
The same happens if I do “sprintf(debugText, “RTL8720 Firmware: %.20s”, rpc_system_version());”.
I did the firmware update (version 2.1.2) and libraries update, according to the videos and @RoSchmi advise.
Only difference compared to the video was that, when I was erasing, it didn’t say “Erasing…” but spitted out a lot of text and then “Flashing…” and “Success!”.
Any other ideas on how to solve this. I’m rather stuck here.