I had that same problem.
Someone told me how to fix it:
"Is there a companion customization item on Treek? When 4.0 went live, most of my ship droids, both sides, disappeared and any that had a companion customization item on had that companion customization item transferred to Treek."
After the 4.0.1 patch can't start Chapter 4. I hit play and then the launch button and the window closes and nothing happens. Don't know if it's cause I did the first 3 chapters during early access or what it is.
The legacy hold should be like the guild bank, where it's easier to tranfer credits between character, without having to use the mailing system. That way you can get credits without having to logout and change characters and then re-logging back in to the other one.
Any chance of getting Sabacc, Holochex, Pazaak, Dejarik, Dueling Dice, and Ratts Race to play in the game. Maybe to play against other players or on board your ship against Companions.