I tried to activate the mod and continue playing my existing savegame. Error right at the beginning.
With a new game, everything seems to work.
17.711 Applying migration: Memory cards: 0.1.0.lua
17.711 Applying migration: Memory cards: 0.3.0.lua
17.711 Applying migration: Memory cards: 0.3.2.lua
17.711 Applying migration: Memory cards: 0.4.0.lua
17.770 Error AppManagerStates.cpp:1636: Error while applying migration: Memory cards: 0.4.0.lua
memory-cards/migrations/0.4.0.lua:47: bad argument #1 of 2 to 'pairs' (table expected, got nil)
stack traceback:
[C]: in function 'pairs'
memory-cards/migrations/0.4.0.lua:47: in function 'update_readers'
memory-cards/migrations/0.4.0.lua:111: in main chunk