The only remedy I found is to use the "Other" box (i.e., the 3rd option) which does not appear to have anything to do with stocks.
After going through one or two screens, you should find a pull-down menu where you can select "RSU" and "ESPPs".
It appears to work (although I can't vouch for the calculations, and some of the questions are confusing).
I also spent a couple of hours w/ Turbo Tax tech support earlier this week. Using screen sharing, the rep was able to confirm the "blank screen" problem I was seeing.
The rep was skeptical that a fix would be available before April 15, but the hope is that it would be fixed by next year.
The rep mentioned another potential remedy (which I have not tried) which is to use the option to "import from my banking institution" (don't know exactly what it's called). In theory, this will load up all the correct forms (e.g., 1099-B).
