[Bug] Can't save files in ctb format. (MacOS) System.NullReferenceException: Object reference not set

[SirKliv]

System

UVtools v5.0.3 Arm64
Operative system: Darwin 24.2.0 Darwin Kernel Version 24.2.0: Fri Dec  6 18:40:14 PST 2024; root:xnu-11215.61.5~2/RELEASE_ARM64_T8103 Arm64
Processor: Apple M1
Processor cores: 8
Memory RAM: 5.84 / 9.98 GB
Runtime: osx-arm64
Framework: .NET 9.0.0
AvaloniaUI: 11.2.3
OpenCV: 4.9.0

Sreens, resolution, working area, usable area:
1: 1440 x 900 @ 100% (Primary) (On this)
    WA: 1440 x 840    UA: 1440 x 840

Path:       /Applications/UVtools.app/Contents/MacOS/
Executable: /Applications/UVtools.app/Contents/MacOS/UVtools
Loaded file: jackal_treasure_island_1.ctb [Version: 4] [Class: ChituboxFile]

UVtools v5.0.3 X64
Operative system: Darwin 24.2.0 Darwin Kernel Version 24.2.0: Fri Dec  6 18:41:43 PST 2024; root:xnu-11215.61.5~2/RELEASE_X86_64 X64
Processor: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Processor cores: 12
Memory RAM: 8.80 / 13.94 GB
Runtime: osx-x64
Framework: .NET 9.0.0
AvaloniaUI: 11.2.3
OpenCV: 4.9.0

Sreens, resolution, working area, usable area:
1: 1792 x 1120 @ 100% (Primary) (On this)
    WA: 1792 x 1057    UA: 1792 x 1057

Path:       /Applications/UVtools.app/Contents/MacOS/
Executable: /Applications/UVtools.app/Contents/MacOS/UVtools
Loaded file: Hornet_jackal_1.ctb [Version: 4] [Class: ChituboxFile]

Printer and Slicer

• Printer: Hardlight Black 2K
• Slicer: Lychee 7.2.0

Description of the bug

Same as #857

How to reproduce

File => Convert to => Chitubox => Chitubox CTB => v1 is work, v2-v5 doesn't

I tried using the terminal command

SlicerFile.MaterialName = string.Empty;

but no effect.

I generated a small ctb file. With it the error also appears.

Files

poussin.ctb.zip

[github-actions]

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[sn4k3]

The file you provide works for me, either save or convert will success without error.