Lightmass crashed: Assertion failed

Development Rendering
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Hi guys,

I got a problem. When I clicked Build, after a short time, the Message Log appeared with the error: Lightmass crashed: Assertion failed … and so many things below.

Please see the image below.

So hope you guys can help me solve this problem. Many thanks and have a good day!!!
P/S: I tried opening the Swarm agent window, validate the cache and then clearing the cache, reset LightmassImportanceVolume and PostProcessVolume …but still bug.
So hope you guys can help me solve this problem. Many thanks and have a good day!!!

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Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks