My boards are Nanos. I've always used ASB in the past because it has always been marked Recommended in my copy of Arduino IDE. At first I thought my issue was that I'd recently updated to Arduino 1.8.13 but fully uninstalling and doing a clean downgrade to 1.8.5 (as recommended by a support tech elsewhere on the forums) has if anything made it all worse.
I *occasionally* get ASB to complete an upload. SVL was initially never working, but I was able to reflash the bootloader. Now it always succeeds at uploading but the uploaded program never runs.
Any sketch with
One of these Nanos arrived seemingly DOA but came to life when I soldered the headers on. The other one is from the same batch. I'm tempted to try blasting a few spots with my air gun and see if that helps...