Hello, I just installed the mod and found that the game crashes whenever I click "Click here while holding an item to set it as a character's icon".

Error while running event bobclasses::on_gui_click (ID 1)
bobclasses/control.lua:1167: attempt to call field 'name' (a string value)
stack traceback:
bobclasses/control.lua:1167: in function 'set_character_icon'
bobclasses/control.lua:745: in function <bobclasses/control.lua:694>

Same error for me:

The mod Bob's Classes and Multiple characters mod (1.1.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event bobclasses::on_gui_click (ID 1)
bobclasses/control.lua:1167: attempt to call field 'name' (a string value)
stack traceback:
bobclasses/control.lua:1167: in function 'set_character_icon'
bobclasses/control.lua:752: in function <bobclasses/control.lua:694>

Thanks for reporting this, I'll investigate!

This will be fixed in v1.2.0