I’m getting this same error here for MonoGame version 3.7.1.189, trying to load an android asset:
Stacktrace:
at <unknown> <0xffffffff>
at (wrapper managed-to-native) object.wrapper_native_0xb690e8dd (MonoGame.OpenGL.TextureTarget,int) <0x00012>
at Microsoft.Xna.Framework.Graphics.Texture2D.GenerateGLTextureIfRequired () [0x0005b] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Graphics.Texture2D/<>c__DisplayClass1.<PlatformConstruct>b__0 () [0x00006] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Threading.BlockOnUIThread (System.Action) [0x0002d] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Graphics.Texture2D.PlatformConstruct (int,int,bool,Microsoft.Xna.Framework.Graphics.SurfaceFormat,Microsoft.Xna.Framework.Graphics.Texture2D/SurfaceType,bool) [0x00064] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Graphics.Texture2D..ctor (Microsoft.Xna.Framework.Graphics.GraphicsDevice,int,int,bool,Microsoft.Xna.Framework.Graphics.SurfaceFormat,Microsoft.Xna.Framework.Graphics.Texture2D/SurfaceType,bool,int) [0x000ca] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Graphics.Texture2D..ctor (Microsoft.Xna.Framework.Graphics.GraphicsDevice,int,int,bool,Microsoft.Xna.Framework.Graphics.SurfaceFormat) [0x0000b] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.Texture2DReader.Read (Microsoft.Xna.Framework.Content.ContentReader,Microsoft.Xna.Framework.Graphics.Texture2D) [0x001a6] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentTypeReader`1<T_REF>.Read (Microsoft.Xna.Framework.Content.ContentReader,object) [0x0000e] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentReader.InnerReadObject<T_REF> (T_REF) [0x00035] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentReader.ReadObject<T_REF> () [0x0000a] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.SpriteFontReader.Read (Microsoft.Xna.Framework.Content.ContentReader,Microsoft.Xna.Framework.Graphics.SpriteFont) [0x0004c] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentTypeReader`1<T_REF>.Read (Microsoft.Xna.Framework.Content.ContentReader,object) [0x0000e] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentReader.InnerReadObject<T_REF> (T_REF) [0x00035] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentReader.ReadObject<T_REF> () [0x0000a] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentReader.ReadAsset<T_REF> () [0x00007] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Content.ContentManager.ReadAsset<T_REF> (string,System.Action`1<System.IDisposable>) [0x00082] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Engine.Program/CustomContentManager.Load<T_REF> (string) [0x00002] in D:\Projects\EngineCS\ALL\Program.cs:357
at Engine.Font.CreateGraphics () [0x0003d] in D:\Projects\EngineCS\ALL\Font.cs:255
at Engine.Program.LoadMainFont () [0x00177] in D:\Projects\EngineCS\ALL\Program.cs:562
at Engine.Program.LoadContent () [0x00001] in D:\Projects\EngineCS\ALL\Program.cs:480
at Microsoft.Xna.Framework.Game.Initialize () [0x00048] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Engine.Program.Initialize () [0x000c9] in D:\Projects\EngineCS\ALL\Program.cs:274
at Microsoft.Xna.Framework.Game.DoInitialize () [0x0002d] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.AndroidGamePlatform.BeforeUpdate (Microsoft.Xna.Framework.GameTime) [0x0000e] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Game.DoUpdate (Microsoft.Xna.Framework.GameTime) [0x0000d] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.Game.Tick () [0x001f6] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.AndroidGameWindow.OnUpdateFrame (object,Microsoft.Xna.Framework.MonoGameAndroidGameView/FrameEventArgs) [0x00047] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.MonoGameAndroidGameView.UpdateFrameInternal (Microsoft.Xna.Framework.MonoGameAndroidGameView/FrameEventArgs) [0x00017] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.MonoGameAndroidGameView.UpdateAndRenderFrame () [0x0005f] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.MonoGameAndroidGameView.processStateRunning (System.Threading.CancellationToken) [0x0005c] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.MonoGameAndroidGameView.RunIteration (System.Threading.CancellationToken) [0x000e2] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Microsoft.Xna.Framework.MonoGameAndroidGameView/<>c__DisplayClasse.<WorkerThreadFrameDispatcher>b__c (object) [0x00017] in <14285e7be6444bda94a4048e3cb68e5b>:0
at Android.App.SyncContext/<>c__DisplayClass3_0.<Send>b__0 () [0x00000] in /Users/builder/data/lanes/6102/8255f42f/source/monodroid/external/xamarin-android/src/Mono.Android/Android.App/SyncContext.cs:51
at Java.Lang.Thread/RunnableImplementor.Run () [0x00008] in /Users/builder/data/lanes/6102/8255f42f/source/monodroid/external/xamarin-android/src/Mono.Android/Java.Lang/Thread.cs:36
at Java.Lang.IRunnableInvoker.n_Run (intptr,intptr) [0x00009] in /Users/builder/data/lanes/6102/8255f42f/source/monodroid/external/xamarin-android/src/Mono.Android/obj/Release/android-28/mcw/Java.Lang.IRunnable.cs:81
at (wrapper dynamic-method) object.17 (intptr,intptr) [0x00011] in <d4a23bbd2f544c30a48c44dd622ce09f>:0
at (wrapper native-to-managed) object.17 (intptr,intptr) [0x00021] in <d4a23bbd2f544c30a48c44dd622ce09f>:0