[Bug Report] Project broken! Can't compile Lightmass, other Project works fine


I now know what my problem is, because of “Compile Lightmass”
The Version is not broken but my Project.

If I open a random 4.16 Project I can compile Lightmass.

But on my current Project i can edit everything, but I can’t compile Lightmass.
“Swarm kick off, Compile Lightmass”

How can I repair it?

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