WPA Preview (11.10.71): Symbol Resolution is Broken (outside of MS)

It appears that symbol resolution is broken in WPA Preview (v11.10.71), though it might not be obvious from within MS.
WPA does not download PDBs. [But if you already have SymCache files cached (or available via //symcache server) then symbols will resolve.]

• Delete or rename c:\Symbols and c:\SymCache
• Launch WPA with a .ETL trace which has providers with stackwalks.
• In WPA > Trace > Configure Symbol Paths > Reset Paths & SymCache

*** BUG: The default path is: srvC:\Symbolshttp://msdl... It should be: HTTPS, not HTTP

• In WPA > Trace > Load Symbols (Confirm connected to the internet.)

*** BUG: Symbols do not load.

• In WPA > Windows > Symbols Hub

*** BUG: All the modules are Unprocessed or Error

*** NOTE: This works fine on the Released version, v11.8.423

Q: What do I need to do differently now in the Preview version?