These just started to pop up with this latest point release. FMod has also been throwing path related errors, so I wonder if something about path parsing changed that is breaking plugins.
Could not open file VirtualArtifacts/Primary/2e2c6aaa7af4ade4484637fbe2eff6b3 for read
UnityEditor.AssetImporter:GetAtPath (string)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings (string) (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:371)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:282)
Spine.Unity.Editor.SpineEditorUtilities:Initialize () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:258)
UnityEditor.EditorApplication:Internal_CallDelayFunctions ()
Assertion failed on expression: 'res'
UnityEditor.AssetImporter:GetAtPath (string)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings (string) (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:371)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:282)
Spine.Unity.Editor.SpineEditorUtilities:Initialize () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:258)
UnityEditor.EditorApplication:Internal_CallDelayFunctions ()
Unknown error occurred while loading 'VirtualArtifacts/Primary/2e2c6aaa7af4ade4484637fbe2eff6b3'.
UnityEditor.AssetImporter:GetAtPath (string)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings (string) (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:371)
Spine.Unity.Editor.SpineEditorUtilities:IssueWarningsForUnrecommendedTextureSettings () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:282)
Spine.Unity.Editor.SpineEditorUtilities:Initialize () (at Assets/Plugins/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:258)
UnityEditor.EditorApplication:Internal_CallDelayFunctions ()