When cryptsetup is not installed on the system, the "Missing File System Support Package" dialog box dispays that cryptsetup is missing but points to an old location [1] where the project was hosted. The project has now been moved to gitlab [2] but the link in the dialog box does not seem to have been updated.
[1] https://code.google.com/p/cryptsetup/ [2] https://gitlab.com/cryptsetup/cryptsetup