CxxWrap.jl, why these code report error?

General Usage
1

I’m using CxxWrap.
My setup:
Julia: 1.7.2
CxxWrap: 0.12.0

when I do this, there come error:

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图片827×793 32.3 KB

the error:
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图片2204×297 16.8 KB

the dependency is

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图片1125×823 38.9 KB

Can anyone can tell me why this error happened?