FiveM : Unable to use Exports when using LemonUI

[Etuldan]

When I add LemonUI as nuget package in order to use it, my exports inside my C# FiveM addon won't work and crash my Client plugin.

Here is my stacktrack inside FiveM Client

[     32719] [b3095_GTAProce]             MainThrd/ trying to get export of user
[     44641] [b3095_GTAProce]             MainThrd/ Trying to get UserData
[     44781] [b3095_GTAProce]             MainThrd/ Error invoking callback for event login:ready: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeLoadException: Could not resolve type with token 0100000e
[     44797] [b3095_GTAProce]             MainThrd/   at (wrapper managed-to-native) System.MonoCustomAttrs:GetCustomAttributesDataInternal (System.Reflection.ICustomAttributeProvider)
[     44797] [b3095_GTAProce]             MainThrd/   at System.MonoCustomAttrs.GetCustomAttributesData (System.Reflection.ICustomAttributeProvider obj) [0x0000e] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Reflection.CustomAttributeData.GetCustomAttributes (System.Reflection.Assembly target) [0x00000] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at Mono.CSharp.ImportedAssemblyDefinition.ReadAttributes () [0x00000] in /mnt/idfk/meow/mono/mcs/mcs/import.cs:1719 
[     44797] [b3095_GTAProce]             MainThrd/   at Mono.CSharp.MetadataImporter.GetAssemblyDefinition (System.Reflection.Assembly assembly) [0x00027] in /mnt/idfk/meow/mono/mcs/mcs/import.cs:972 
[     44797] [b3095_GTAProce]             MainThrd/   at Mono.CSharp.ReflectionImporter.ImportAssembly (System.Reflection.Assembly assembly, Mono.CSharp.RootNamespace targetNamespace) [0x00000] in /mnt/idfk/meow/mono/mcs/mcs/reflection.cs:86 
[     44797] [b3095_GTAProce]             MainThrd/   at Microsoft.CSharp.RuntimeBinder.DynamicContext.Create () [0x000c6] in /mnt/idfk/meow/mono/mcs/class/Microsoft.CSharp/Microsoft.CSharp.RuntimeBinder/DynamicContext.cs:104 
[     44797] [b3095_GTAProce]             MainThrd/   at Microsoft.CSharp.RuntimeBinder.CSharpInvokeMemberBinder.FallbackInvokeMember (System.Dynamic.DynamicMetaObject target, System.Dynamic.DynamicMetaObject[] args, System.Dynamic.DynamicMetaObject errorSuggestion) [0x00006] in /mnt/idfk/meow/mono/mcs/class/Microsoft.CSharp/Microsoft.CSharp.RuntimeBinder/CSharpInvokeMemberBinder.cs:156 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Dynamic.DynamicObject+MetaDynamic.BindInvokeMember (System.Dynamic.InvokeMemberBinder binder, System.Dynamic.DynamicMetaObject[] args) [0x0003c] in <31b946cfddcc4ab993dd6d559e89c25f>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Dynamic.InvokeMemberBinder.Bind (System.Dynamic.DynamicMetaObject target, System.Dynamic.DynamicMetaObject[] args) [0x00016] in <31b946cfddcc4ab993dd6d559e89c25f>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Dynamic.DynamicMetaObjectBinder.Bind (System.Object[] args, System.Collections.ObjectModel.ReadOnlyCollection`1[T] parameters, System.Linq.Expressions.LabelTarget returnLabel) [0x000c6] in <31b946cfddcc4ab993dd6d559e89c25f>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Runtime.CompilerServices.CallSiteBinder.BindCore[T] (System.Runtime.CompilerServices.CallSite`1[T] site, System.Object[] args) [0x00019] in <31b946cfddcc4ab993dd6d559e89c25f>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Runtime.CompilerServices.CallSiteOps.Bind[T] (System.Runtime.CompilerServices.CallSiteBinder binder, System.Runtime.CompilerServices.CallSite`1[T] site, System.Object[] args) [0x00000] in <31b946cfddcc4ab993dd6d559e89c25f>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at (wrapper dynamic-method) System.Object:CallSite.Target (System.Runtime.CompilerServices.Closure,System.Runtime.CompilerServices.CallSite,object)
[     44797] [b3095_GTAProce]             MainThrd/   at TestResourceDotNet.Client.ClientMain.Onlogin (System.String obj) [0x0000a] in E:\Dev\FiveM\TestResourceDotNet\Client\ClientMain.cs:24 
[     44797] [b3095_GTAProce]             MainThrd/   at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
[     44797] [b3095_GTAProce]             MainThrd/   at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00032] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/    --- End of inner exception stack trace ---
[     44797] [b3095_GTAProce]             MainThrd/   at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00048] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x000e7] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00008] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <b575c7ac070e41ffa0751333b6ac9f42>:0 
[     44797] [b3095_GTAProce]             MainThrd/   at CitizenFX.Core.EventHandlerEntry+<Invoke>d__5.MoveNext () [0x00064] in C:\gl\builds\cfx-fivem\production\fivem\code\client\clrcore\EventHandlerDictionary.cs:107 

My simple example code is :

using System;
using System.Threading.Tasks;
using CitizenFX.Core;
using LemonUI;

namespace TestResourceDotNet.Client
{
    public class ClientMain : BaseScript
    {
        public ClientMain()
        {
            var pool = new ObjectPool();
            EventHandlers["login:ready"] += new Action<string>(Onlogin);
        }

        private void Onlogin(string obj)
        {
            Debug.WriteLine("Trying to get UserData");
            var b = Exports["my_external_resource"].user();
            Debug.WriteLine(b.firstname);
            Debug.WriteLine("Done");
        }

        [Tick]
        public Task OnTick()
        {
            return Task.FromResult(0);
        }
    }
}

The crash occurs when Onlogin is trigger by my custom login:ready event, and right after the debug message Trying to get UserData

My csproj is made from the FiveM template resource, and I just added the LemonUI.FiveM package from nuget ( I'm using VS2022 and the FiveM SDK seems to use .NET Framework 4.5.2)

<Project Sdk="CitizenFX.Sdk.Client/0.2.3">
    <ItemGroup>
        <Compile Include="../Shared/**/*.cs" />
    </ItemGroup>
    <ItemGroup>
      <PackageReference Include="LemonUI.FiveM" Version="2.0.0" />
    </ItemGroup>
</Project>

I put the 3 .dll files CitizenFX.Core.Client.dll LemonUI.FiveM.dll TestResourceDotNet.Client.net.dll generated by the build inside a Client folder, and my fxmanifest.lua is

fx_version 'cerulean'
game 'gta5'

files {
    'Client/CitizenFX.Core.Client.dll',
    'Client/LemonUI.FiveM.dll'
} 

client_script 'Client/TestResourceDotNet.Client.net.dll'

author 'Etuldan'
version '1.0.0'
description 'Test LemonUI'

Besides the Exports crashes, LemonUI features seems to be working fine.

[justalemon]

'Client/CitizenFX.Core.Client.dll'

This should NOT be included. This is the dll that contains the classes used in the client, this should be loaded from FiveM and not from your files.

[Etuldan]

'Client/CitizenFX.Core.Client.dll'

This should NOT be included. This is the dll that contains the classes used in the client, this should be loaded from FiveM and not from your files.

Unfortunately, I have the same issue without loading (in the fxmanifest) and/or copying the "CitizenFX.Core.Client.dll" from my build into the Client folder.

[justalemon]

Looks like #85 is somehow back after some FiveM updates.

[Etuldan]

To be clear, my whole game doesn't crash, only my .NET module/plugin (client-side)

[justalemon]

Yes, but it shows the same behavior: dynamic objects don't work, and exports are dynamics, hence exports will not work.