Execution Timeout Expired error

[jobalbz]

Our company is relying on this tool to track the daily usage on Azure. Our database is getting bigger and I'm getting this error below for a few days. Any suggestion how to extend the timeout? Thanks in advance.

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Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Exception while executing function: Functions.ProcessQueueMessage ---> System.Data.SqlClient.SqlException: Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding. ---> System.ComponentModel.Win32Exception: The wait operation timed out --

[jobalbz]

I increased the DTU and application host size. It has now a different error:
Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Exception while executing function: Functions.ProcessQueueMessage ---> System.NullReferenceException: Object reference not set to an instance of an object.
at WebJobBillingData.Functions.ProcessQueueMessage(BillingRequest billingRequest, TextWriter logWriter)
at lambda_method(Closure , Functions , Object[] )
at Microsoft.Azure.WebJobs.Host.Executors.VoidMethodInvoker1.InvokeAsync(TReflected instance, Object[] arguments) at Microsoft.Azure.WebJobs.Host.Executors.FunctionInvoker1.d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at