Generating Spectral Library using polygon shape does not work

Motivation

In order to apply regression based unmixing , it is necessary to generate a spectral library with attributes before.

It is really annoying If you have to generate this library click by click by your own.

A better way would be if you just prepare a polygon shape file with your classes. (I did this.)

Issue

If you have once your shape I tought I can just use the enmapbox function Import profiles from raster + vector source

in the spectral library window.

Unfortunately if I try that, my QGIS crashes without an error.

First a window appears that the profiles are read, then it crashes and QGIS restart is necessary.

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I also tried to convert the polygones to points (according the GSD of the image).

Same result.

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