Reproduction steps:
1. Create a new project
2. Press AI button on the top Editor toolbar and press “Agree and install Unity AI” button
3. Wait for package to finish installing and observe the Console

Actual result: “ArgumentException: Requested value 'Textures' was not found” errors are thrown
Expected result: No errors or warnings are thrown

Reproducible with: 1.0.0-pre.20 (6000.3.3f1, 6000.4.0b3, 6000.5.0a4)
Couldn’t reproduce with: 6000.0.65f1 (No AI packages)

Reproduced on: macOS Tahoe 26.1 (M4), Windows 11

Notes:

• Issue doesn’t reproduce when installing packages via Package Manager
• Full errors:

{code:java}
ArgumentException: Requested value 'Textures' was not found.
Newtonsoft.Json.Utilities.EnumUtils.ParseEnum (System.Type enumType, Newtonsoft.Json.Serialization.NamingStrategy namingStrategy, System.String value, System.Boolean disallowNumber) (at <761cf2a144514d2291a678c334d49e9b>:0)
Newtonsoft.Json.Converters.StringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <761cf2a144514d2291a678c334d49e9b>:0)
Rethrow as JsonSerializationException: Error converting value "Textures" to type 'SuperProxyClientV1Namespace.CategoryEnumV1'. Path 'Items[107].Category', line 1, position 219967.
Newtonsoft.Json.Converters.StringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <761cf2a144514d2291a678c334d49e9b>:0)
SuperProxyClientV1Namespace.CustomStringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <0dcadd3eb269413b96c7d9dde651ac95>:0)
UnityEngine.Debug:LogException(Exception)
Unity.AI.Toolkit.Accounts.Services.Core.<>c__DisplayClass1_0:<LogDebug>b__0() (at ./Library/PackageCache/com.unity.ai.toolkit@48a271771d1a/Modules/Accounts/Services/Core/Logger.cs:30)
Unity.AI.Toolkit.<>c__DisplayClass15_0:<RunOnMainThread>b__0() (at ./Library/PackageCache/com.unity.ai.toolkit@48a271771d1a/Modules/Async/EditorTask.cs:330)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions() (at /Users/bokken/build/output/unity/unity/Editor/Mono/EditorApplication.cs:403) {code}
{code:java}
ArgumentException: Requested value 'Textures' was not found.
Newtonsoft.Json.Utilities.EnumUtils.ParseEnum (System.Type enumType, Newtonsoft.Json.Serialization.NamingStrategy namingStrategy, System.String value, System.Boolean disallowNumber) (at <761cf2a144514d2291a678c334d49e9b>:0)
Newtonsoft.Json.Converters.StringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <761cf2a144514d2291a678c334d49e9b>:0)
Rethrow as JsonSerializationException: Error converting value "Textures" to type 'SuperProxyClientV1Namespace.CategoryEnumV1'. Path 'Items[108].Category', line 1, position 221235.
Newtonsoft.Json.Converters.StringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <761cf2a144514d2291a678c334d49e9b>:0)
SuperProxyClientV1Namespace.CustomStringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) (at <0dcadd3eb269413b96c7d9dde651ac95>:0)
UnityEngine.Debug:LogException(Exception)
Unity.AI.Toolkit.Accounts.Services.Core.<>c__DisplayClass1_0:<LogDebug>b__0() (at ./Library/PackageCache/com.unity.ai.toolkit@48a271771d1a/Modules/Accounts/Services/Core/Logger.cs:30)
Unity.AI.Toolkit.<>c__DisplayClass15_0:<RunOnMainThread>b__0() (at ./Library/PackageCache/com.unity.ai.toolkit@48a271771d1a/Modules/Async/EditorTask.cs:330)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions() (at /Users/bokken/build/output/unity/unity/Editor/Mono/EditorApplication.cs:403)
{code}