Unmix Vocals function crashes my computer

I’m using the version that is included at Cubase 11.
The standalone application works in general. All fine. Except:
The function Unmix Vocals crashes my computer like a hard reset. I never had a crash like this before.
No matter what material I use. All end with an immediate restart of the computer.
The progress bar shows 0% -> bang.
Any ideas?

Log:
19:22:23.355 3b10 INFO C:\Program Files\Steinberg\SpectraLayers 7\Win64\SpectraLayers.exe
19:22:23.355 3b10 INFO auto-detected folder: C:\Program Files\Steinberg\SpectraLayers 7\Win64
19:22:23.361 3b10 INFO early init done
19:22:23.365 3b10 INFO creating app…
19:22:23.419 3b10 INFO loading properties…
19:22:25.306 3b10 INFO session SpectraLayers 2020.11.12-19.22.23.350 started - slo7srv
19:22:25.306 3b10 INFO SpectraLayers One 7.0.20 Build 249 (x64 - Qt 5.15.1 - qtnamespace: SpectraLayers - qtlibinfix: SL - dynamic opengl - MSVC 1916)
19:22:25.582 3b10 INFO OS: Windows 10 Version 2004 (Kernel: 10.0.19041) (de_CH)
19:22:25.582 3b10 INFO CPU: 16 threads (AVX2)
19:22:25.582 3b10 INFO RAM: 32 GB
19:22:25.582 3b10 INFO HDD: 428 GB (282 GB free)
19:22:25.583 3b10 INFO SCR0: 1680x1050x32@59Hz (device pixel ratio: 1) (primary)
19:22:25.583 3b10 INFO SCR1: 1920x1080x32@60Hz (device pixel ratio: 1)
19:22:25.583 3b10 INFO SCR2: 1920x1080x32@60Hz (device pixel ratio: 1)
19:22:25.797 3b10 INFO creating window…
19:22:25.819 3b10 INFO loading plugins…
19:22:26.929 3b10 INFO 9 plugins loaded
19:22:26.929 3b10 INFO initializing UI…
19:22:26.998 3b10 INFO layout and graphic objects initialized
19:22:27.028 3b10 INFO setting shortcuts and properties
19:22:27.150 3b10 INFO UI initialized
19:22:27.162 3b10 INFO Ready
19:22:27.191 3b10 INFO Show
19:22:27.191 3b10 INFO dll directory set to: C:\Program Files\Steinberg\SpectraLayers 7\Win64
19:22:27.233 391c INFO checking WASAPI…
19:22:27.239 391c INFO scanning 3 devices…
19:22:27.250 391c INFO BIG KNOB STUDIO+ 1-2 (BIG KNOB STUDIO+) (0/2 channels, 44100 Hz) (default output)
19:22:27.257 391c INFO Realtek Digital Output (Realtek® Audio) (0/2 channels, 48000 Hz)
19:22:27.265 391c INFO Line (BIG KNOB STUDIO+) (2/0 channels, 44100 Hz) (default input)
19:22:27.267 3b10 INFO I/O: WASAPI (Default System Input/Default System Output)
19:22:54.982 3b10 INFO importing: E:/Projekte/Bang/Audio/Vox Part 3.wav
19:22:54.982 3b10 INFO session path: C:\Users\xxxx\AppData\Roaming\Steinberg\SpectraLayers 7.0\Cache
19:22:54.982 3b10 INFO providing path: C:\Users\xxxx\AppData\Roaming\Steinberg\SpectraLayers 7.0\Cache\layer(1bde7383).pcm
19:22:55.072 3b10 INFO Read Vox Part 3.wav SamplingFormat(Real, 44100Hz, Audio, 2 channel(s), mapping: 11) 364386 samples, 24 bits int )
19:22:55.080 391c INFO Project Samplerate: 44100Hz Device Samplerate: 44100Hz
19:22:55.163 3b10 INFO GPU: Google Inc. / ANGLE (Intel® UHD Graphics 630 Direct3D11 vs_5_0 ps_5_0)
19:22:55.163 3b10 INFO OGL: OpenGL ES 3.0 (ANGLE 2.1.0.57ea533f79a7) / OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0.57ea533f79a7) / OpenGL ES 3 . 0 Core