Error while parsing when loading old campaign save

[Illiou]

When I open the Load game dialog and select an old save from the campaign in 0.16 the game throws an error message (in Windows) that reads:

Code: Select all

Error while parsing __base__/campaigns/beta/description.json:
File __base__/campaigns/beta/description.json not found

When I then go ahead to load it the game gives a message reading

Code: Select all

The scenario level caused a non-recoverable error.
Please report this error to the scenario author.

Error while running event level::on_tick (ID 0)
__core__/lualib/story.lua:54: attempt to index field 'helpers' (a nil value)
stack traceback:
	__core__/lualib/story.lua:54: in function 'story_update'
	...Data/Roaming/Factorio/temp/currently-playing/control.lua:221: in function <...Data/Roaming/Factorio/temp/currently-playing/control.lua:220>

I don't know if the second error is sensible to fix but the first one is annoying as it happens while just selecting a save.