텍스트 박스 유지와 readback 모듈

I'm?sorry,?but?an?uncaught?exception?occurred.

While?running?game?code:
??File?"renpy/common/00gamemenu.rpy",?line?144,?in?script
??File?"renpy/common/00gamemenu.rpy",?line?144,?in?python
??File?"game/readback.rpy",?line?256,?in?python
Exception:?Cannot?display?None?as?text.

--?Full?Traceback?------------------------------------------------------------

Full?traceback:
??File?"???renpy-6.15.5-sdkrenpyexecution.py",?line?288,?in?run
????node.execute()
??File?"???renpy-6.15.5-sdkrenpyast.py",?line?718,?in?execute
????renpy.python.py_exec_bytecode(self.code.bytecode,?self.hide,?store=self.store)
??File?"???renpy-6.15.5-sdkrenpypython.py",?line?1297,?in?py_exec_bytecode
????exec?bytecode?in?globals,?locals
??File?"renpy/common/00gamemenu.rpy",?line?144,?in?<module>
????$?ui.interact()
??File?"???renpy-6.15.5-sdkrenpyui.py",?line?237,?in?interact
????rv?=?renpy.game.interface.interact(roll_forward=roll_forward,?**kwargs)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?1853,?in?interact
????repeat,?rv?=?self.interact_core(preloads=preloads,?**kwargs)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?2092,?in?interact_core
????root_widget.visit_all(lambda?i?:?i.per_interact())
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?250,?in?visit_all
????d.visit_all(callback)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?250,?in?visit_all
????d.visit_all(callback)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?250,?in?visit_all
????d.visit_all(callback)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?250,?in?visit_all
????d.visit_all(callback)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?252,?in?visit_all
????callback(self)
??File?"???renpy-6.15.5-sdkrenpydisplaycore.py",?line?2092,?in?<lambda>
????root_widget.visit_all(lambda?i?:?i.per_interact())
??File?"???renpy-6.15.5-sdkrenpydisplayscreen.py",?line?166,?in?per_interact
????self.update()
??File?"???renpy-6.15.5-sdkrenpydisplayscreen.py",?line?266,?in?update
????self.screen.function(**self.scope)
??File?"???renpy-6.15.5-sdkrenpyscreenlang.py",?line?1217,?in?__call__
????renpy.python.py_exec_bytecode(self.code.bytecode,?locals=scope)
??File?"???renpy-6.15.5-sdkrenpypython.py",?line?1297,?in?py_exec_bytecode
????exec?bytecode?in?globals,?locals
??File?"game/readback.rpy",?line?256,?in?<module>
????text?line[1]
??File?"???renpy-6.15.5-sdkrenpyui.py",?line?448,?in?__call__
????w?=?self.function(*args,?**keyword)
??File?"???renpy-6.15.5-sdkrenpytexttext.py",?line?1107,?in?__init__
????raise?Exception("Cannot?display?{0!r}?as?text.".format(i))
Exception:?Cannot?display?None?as?text.

Windows-7-6.1.7601-SP1
Ren'Py?6.15.5.354