Unity导入PSB文件触发NullReferenceException空引用错误求助

问题现象 #

将2D角色PSB文件拖入Unity时，出现以下空引用异常：

NullReferenceException: Max Size: SerializedProperty is null
UnityEditor.EditorGUI.BeginPropertyInternal (UnityEngine.Rect totalPosition, UnityEngine.GUIContent label, UnityEditor.SerializedProperty property) (at <0d6ce211ebbc47e1a35a84c3672ff58f>:0)
UnityEditor.EditorGUI.BeginProperty (UnityEngine.Rect totalPosition, UnityEngine.GUIContent label, UnityEditor.SerializedProperty property) (at <0d6ce211ebbc47e1a35a84c3672ff58f>:0)
UnityEditor.Modules.DefaultTextureImportSettingsExtension.ShowImportSettings (UnityEditor.BaseTextureImportPlatformSettings editor) (at <0d6ce211ebbc47e1a35a84c3672ff58f>:0)
UnityEditor.BaseTextureImportPlatformSettings.ShowPlatformSpecificSettings (System.Collections.Generic.List`1[T] platformSettings, System.Int32 selected) (at <0d6ce211ebbc47e1a35a84c3672ff58f>:0)
UnityEditor.U2D.Common.TexturePlatformSettingsHelper.ShowPlatformSpecificSettings () (at Library/PackageCache/com.unity.2d.common@6.0.3/Editor/InternalBridge/TexturePlatformSettings/TexturePlatformSettings.cs:158)
UnityEditor.U2D.PSD.PSDImporterEditor.DoPlatformSettings () (at Library/PackageCache/com.unity.2d.psdimporter@6.0.4/Editor/PSDImporterEditor.cs:419)
UnityEditor.U2D.PSD.PSDImporterEditor.DoSettingsUI () (at Library/PackageCache/com.unity.2d.psdimporter@6.0.4/Editor/PSDImporterEditor.cs:274)
UnityEditor.U2D.PSD.PSDImporterEditor.OnInspectorGUI () (at Library/PackageCache/com.unity.2d.psdimporter@6.0.4/Editor/PSDImporterEditor.cs:232)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <122642d41668428d845063b1753c4e72>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

错误界面截图：

解决方法 #

• 检查并更新2D相关包版本：打开Package Manager，找到com.unity.2d.psdimporter和com.unity.2d.common，确保版本与当前Unity版本兼容。如果版本过旧，更新到推荐版本；如果是新版本出现问题，回退到稳定版。
• 重置PSB文件导入设置：选中报错的PSB文件，在Inspector面板底部点击Reset按钮，或者右键选择Reimport重新导入文件。
• 清理Library缓存：关闭Unity，删除项目根目录下的Library文件夹，重新打开Unity等待缓存重建完成后再尝试导入。
• 验证PSB文件完整性：用Photoshop打开该PSB文件，检查是否有损坏的图层、通道或异常结构，重新保存后再导入Unity。
• 排查项目配置问题：创建一个新的空白Unity项目，导入同一个PSB文件，如果能正常导入，说明原项目存在配置异常，可尝试迁移资源到新项目。

内容的提问来源于stack exchange，提问作者Hebele Hübele