same " Error: aria2c exited with code 15"
linux here.
(in addition to other errors on updating a game - like couldnt create symlink, stuck/hanging UI on mouseclick, etc)
Same issues. im playing on linux - never had issues with updates on turtle. Octolauncher is acid.
Each time i need an update causes a voodoo dances and waving a dead chicken via launcher.
Please add launcher support for linux or add in-game updates.