UE4.27 - weird error: Hung shadermap detected, time spent compiling: 7200 seconds

Hello world again! I am now trying to package the game on UE4.27.2 and I have got a weird error:

UATHelper: Packaging (Windows (64-bit)): LogShaderCompilers: Error: Hung shadermap detected, time spent compiling: 7200.001127 seconds, NumPendingJobs: 999, FinishedJobs: 2050
PackagingResults: Error: Hung shadermap detected, time spent compiling: 7200.001127 seconds, NumPendingJobs: 999, FinishedJobs: 2050

What can this mean? Search engines provide no information about this error. The packaging is still going on, and I don’t know if this error is breaking, but it is really weird. Does anyone know something about it and how to fix it?

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meto