An error occurred migrating site collection

Hello every one,

I am new in Quest. And i start use it to migrate Mailbox and SharePoint online site. 

in the second case, i try to follow all the requirements and steps to migrate a site collection from one tenant to another one. .

Any way, after some processing, i get this kind of error An error occurred migrating site collection.

System.ArgumentNullException: Value cannot be null. (Parameter 'context') at Quest.QMMP.SPM.Functions.Host.EntityOperationsHost.GetConnection(IConnectionContext context) in D:\a\1\s\Source Code\Quest.QMMP.SPM.Functions\Host\EntityOperationsHost.cs:line 93 at Quest.QMMP.SPM.Functions.Functions.MigrateEntitiesFunctions.CheckAllowMigrateEntity(IDurableActivityContext context) in D:\a\1\s\Source Code\Quest.QMMP.SPM.Functions\Functions\MigrateEntitiesFunctions.cs:line 297 at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker`2.InvokeAsync(Object instance, Object[] arguments) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionInvoker.cs:line 52 at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.InvokeAsync(IFunctionInvoker invoker, ParameterHelper parameterHelper, CancellationTokenSource timeoutTokenSource, CancellationTokenSource functionCancellationTokenSource, Boolean throwOnTimeout, TimeSpan timerInterval, IFunctionInstance instance) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 585 at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstanceEx instance, ParameterHelper parameterHelper, ILogger logger, CancellationTokenSource functionCancellationTokenSource) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 532 at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance, ParameterHelper parameterHelper, IFunctionOutputDefinition outputDefinition, ILogger logger, CancellationTokenSource functionCancellationTokenSource) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 468 at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(IFunctionInstanceEx instance, FunctionStartedMessage message, FunctionInstanceLogEntry instanceLogEntry, ParameterHelper parameterHelper, ILogger logger, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.cs:line 278 Value cannot be null. (Parameter 'context')

can any one give a support and telling me how to migrate a simple site collection from one sharepoint online to another one?

Many thanks to all you guys.

Andi