Unable to patch LDTK project file

[TLINDEN]

Hi,

I've got a somewhat unusual concern: I want to procedurally generate levels, but I want to use LDTK to create the input for the generator (example tileset etc) AND I want the generator to output an LDTK file, so that I can edit the generated levels to adjust some tiles here and there, place entities etc.

This is the file I created so far: https://gist.github.com/TLINDEN/141dbc60194a20e7ecf30626bdf27b9e

The problem is that LDTK doesn't load it, I get this error:

cannot read properties of null (reading 'externalLevels') (TypeError)

There's nothing wrong with externalLevels. It's just false both in the source LDTK file and the generated one.

Could you please tell me what might be wrong with the generated file?

Thanks in advance!
Tom