To reproduce enter an avatar control center then switch to uplink and click on the refresh button of the interface.
Hiding the interface during uplink would be a good idea.
Here is the crash output:
The mod Avatars (0.5.23) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Avatars::on_gui_click (ID 1)
__Avatars__/scripts/sort.lua:8: attempt to index field 'vehicle' (a nil value)
stack traceback:
__Avatars__/scripts/sort.lua:8: in function 'getSortedTable'
__Avatars__/scripts/gui.lua:108: in function 'draw'
__Avatars__/scripts/gui.lua:275: in function 'update'
__Avatars__/scripts/gui.lua:72: in function 'update'
__Avatars__/control.lua:95: in function <__Avatars__/control.lua:65>