Just recently purchased the last few expansions, and upon opening the launcher for the first time after purchase I now get this error message:
"Insufficient memory to install update files. Please confirm that there is at least 25680 MB of storage available" after which the launcher closes.
I have more than enough storage space available. The game was working just fine before I bought the expansions, this is rather frustrating. I am playing on an iMac with 115GB free storage.