I had same problem. After talking to support staff for hours they could not figure it out. So I compared last years files to current. There is a file missing under forms called "Cai_19" which contains all the files. I found that I needed a file "wcaiperf.key" before the previous file can be installed. I then downloaded the CA state update and it worked.
Somehow when you file install Turbotax this file got lost in the installation.
