are you sure you bought it? the price should have changed to 60k
if that's the case, the gui just didn't update.
maybe try buying a health potion and see if that updates it...
for further testing you can use this command to cheat gold:
/c remote.call("rpg-items","add_gold", game.player.force, 60000)
couldn't reproduce it with your savegame and mods either.
i used the command i posted to cheat some money and bought the bonus slot in the market. it updated immediately and i was able to buy 5 items.
the "+1 inventory slot" in the talents window only adds 1 normal inventory slot where you can store normal items like ore, plates, assemblers etc.
I have tried removing all mods so RPG Items is the only one, but it seems to still have the problem of being unable to buy. I used the gold cheat and filled all four slots with items and clicked on Bonus slot, but no lower menu popped up like the other items. Also, how do you toggle aura from flame cloak.
you can toggle the aura with a left click
the price of the bonus slot is hardcoded, you can't change it with the price multiplier
just to make sure:
- you used the savegame you sent me
- you entered this command: /c remote.call("rpg-items","add_gold", game.player.force, 50000)
- the gold amount under your items shows a higher number than the price of the bonus slot (>50000)
- you made a right click in the market on the bonus slot
- nothing changed