Problems with Ai masking in 14.1.1

When using the Ai masking selection on an image the select subject and the select background opens the mask window but then it immediately closes with performing any action.

The select sky mask does work correctly.  

System data below 

Lightroom Classic version: 14.1.1 [ 202412150940-551fb044 ]

License: Creative Cloud

Language setting: en

Operating system: Windows 10 - Business Edition

Version: 10.0.19045

Application architecture: x64

System architecture: x64

Logical processor count: 4

Processor speed: 3.0GHz

SqLite Version: 3.36.0

CPU Utilisation: 4.0%

Power Source: Plugged In

Built-in memory: 32678.5 MB

Dedicated GPU memory used by Lightroom: 1132.6MB / 2007.3MB (56%)

Real memory available to Lightroom: 32678.5 MB

Real memory used by Lightroom: 5509.2 MB (16.8%)

Virtual memory used by Lightroom: 6608.5 MB

GDI objects count: 958

USER objects count: 3039

Process handles count: 2845

Memory cache size: 4599.2MB

Internal Camera Raw version: 17.1 [ 2098 ]

Maximum thread count used by Camera Raw: 3

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 2059MB / 16339MB (12%)

Camera Raw real memory: 1391MB / 32678MB (4%)

Cache1:

Final1- RAM:352.0MB, VRAM:0.0MB, MTA_1628.NEF

Final2- RAM:181.0MB, VRAM:0.0MB, IMG_E0972.JPG

NT- RAM:533.0MB, VRAM:0.0MB, Combined:533.0MB

Cache2:

m:4599.2MB, n:534.2MB

U-main: 145.0MB

System DPI setting: 96 DPI

Desktop composition enabled: Yes

Standard Preview Size: 1440 pixels

Displays: 1) 2560x1440

Input types: Multitouch: No, Integrated touch: No, Integrated pen: Yes, External touch: No, External pen: Yes, Keyboard: No

Graphics Processor Info:

DirectX: NVIDIA GeForce GT 730 (30.0.14.7514)

Init State: GPU for Display supported by default

User Preference: Auto

Enable HDR in Library: ON

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic

Library Path: E:\pictures\Lightroom Catalog\2020-v13-3.lrcat

Settings Folder: C:\Users\19nas\AppData\Roaming\Adobe\Lightroom

Installed Plugins:

1) AdobeStock

2) Flickr

3) HDR Efex Pro 2

Config.lua flags:

Adapter #1: Vendor : 10de

                Device : 1287

                Subsystem : 3f861642

                Revision : a1

                Video Memory : 2007

Adapter #2: Vendor : 8086

                Device : 5912

                Subsystem : 310217aa

                Revision : 4

                Video Memory : 80

Adapter #3: Vendor : 1414

                Device : 8c

                Subsystem : 0

                Revision : 0

                Video Memory : 0

AudioDeviceIOBlockSize: 1024

AudioDeviceName: System Default - Speakers (Jabra SPEAK 410 USB)

AudioDeviceNumberOfChannels: 2

AudioDeviceSampleRate: 48000

Build: LR5x26

Direct2DEnabled: false

GL_ACCUM_ALPHA_BITS: 16

GL_ACCUM_BLUE_BITS: 16

GL_ACCUM_GREEN_BITS: 16

GL_ACCUM_RED_BITS: 16

GL_ALPHA_BITS: 0

GL_BLUE_BITS: 8

GL_DEPTH_BITS: 24

GL_GREEN_BITS: 8

GL_MAX_3D_TEXTURE_SIZE: 2048

GL_MAX_TEXTURE_SIZE: 16384

GL_MAX_TEXTURE_UNITS: 4

GL_MAX_VIEWPORT_DIMS: 16384,16384

GL_RED_BITS: 8

GL_RENDERER: NVIDIA GeForce GT 730/PCIe/SSE2

GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA

GL_STENCIL_BITS: 8

GL_VENDOR: NVIDIA Corporation

GL_VERSION: 4.6.0 NVIDIA 475.14

GPUDeviceEnabled: false

OGLEnabled: true

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules.]