Crash when first talking with Sophita

I'm sorry, but an uncaught exception occurred.

While running game code:
File "game/script.rpy", line 2554, in script
call screen store_union
File "renpy/common/000statements.rpy", line 457, in execute_call_screen
store._return = renpy.call_screen(name, *args, **kwargs)
File "game/store.rpy", line 25, in execute
screen store_union:
File "game/store.rpy", line 37, in execute
vbox:
File "game/store.rpy", line 39, in execute
viewport:
File "game/store.rpy", line 45, in execute
frame:
File "game/store.rpy", line 50, in execute
vbox:
File "game/store.rpy", line 52, in execute
for item in store_items:
File "game/store.rpy", line 53, in execute
if item.isVisible():
File "game/classes.rpy", line 3140, in isVisible
return eval(self.visibility_condition)
AttributeError: 'NoneType' object has no attribute 'move_cost'

-- Full Traceback ------------------------------------------------------------

Full traceback:
File "game/script.rpy", line 2554, in script
call screen store_union
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\ast.py", line 1641, in execute
self.call("execute")
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\ast.py", line 1659, in call
renpy.statements.call(method, parsed, *args, **kwargs)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\statements.py", line 144, in call
return method(parsed, *args, **kwargs)
File "renpy/common/000statements.rpy", line 457, in execute_call_screen
store._return = renpy.call_screen(name, *args, **kwargs)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\exports.py", line 2336, in call_screen
rv = renpy.ui.interact(mouse="screen", type="screen", roll_forward=roll_forward)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\ui.py", line 277, in interact
rv = renpy.game.interface.interact(roll_forward=roll_forward, **kwargs)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\core.py", line 2259, in interact
scene_lists.replace_transient()
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\core.py", line 672, in replace_transient
self.remove(layer, tag)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\core.py", line 959, in remove
self.hide_or_replace(layer, remove_index, "hide")
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\core.py", line 883, in hide_or_replace
d = oldsle.displayable._hide(now - st, now - at, prefix)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\screen.py", line 426, in _hide
self.update()
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\display\screen.py", line 556, in update
self.screen.function(**self.scope)
File "game/store.rpy", line 25, in execute
screen store_union:
File "game/store.rpy", line 37, in execute
vbox:
File "game/store.rpy", line 39, in execute
viewport:
File "game/store.rpy", line 45, in execute
frame:
File "game/store.rpy", line 50, in execute
vbox:
File "game/store.rpy", line 52, in execute
for item in store_items:
File "game/store.rpy", line 53, in execute
if item.isVisible():
File "<screen language="">", line 53, in <module>
File "game/classes.rpy", line 3140, in isVisible
return eval(self.visibility_condition)
File "C:\Program Files (x86)\Steam\steamapps\common\Sunrider\renpy\python.py", line 1479, in py_eval
return eval(py_compile(source, 'eval'), globals, locals)
File "<none>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'move_cost'

Windows-8-6.2.9200
Ren'Py 6.99.3.404
Sunrider Mask of Arcadius Beta 7.2</module></none></module></screen>