I have exactly this same error : Exception Details: System.InvalidOperationException: Timeouts are not supported on this stream. #1426
My case is an application Service having a stream Parameter System.ComponentModel.ReflectPropertyDescriptor.GetValue(Object component) Abp.Runtime.Validation.Interception.MethodInvocationValidator.ValidateObjectRecursively(Object validatingObject) Abp.Runtime.Validation.Interception.MethodInvocationValidator.ValidateMethodParameter(ParameterInfo parameterInfo, Object parameterValue) Abp.Runtime.Validation.Interception.MethodInvocationValidator.Validate() Abp.Runtime.Validation.Interception.ValidationInterceptor.Intercept(IInvocation invocation) Castle.DynamicProxy.AbstractInvocation.Proceed() Castle.Proxies.ProduitServiceProxy.ImportProducts(Stream imports) Lako.Tests.ServicesLako.ProduitsTest.ImportProducts() ProduitsTest.cs: line: 38
as you can see, it's during an unit test on an Application service.
Thanks !