Since some weeks, we get 3 error logs each time MailChimp scheduled task try to start but we did not change any site config / code or Mailchimp config.
MailChimp error. Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.
at MailChimp.Net.Core.BaseLogic.Hash(String emailAddressOrHash)
at Nop.Plugin.Misc.MailChimp.Services.MailChimpManager.GetDeleteSubscriptionsOperations()
at Nop.Plugin.Misc.MailChimp.Services.MailChimpManager.GetSubscriptionsOperations()
at Nop.Plugin.Misc.MailChimp.Services.MailChimpManager.<>c__DisplayClass75_0.<<Synchronize>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Nop.Plugin.Misc.MailChimp.Services.MailChimpManager.HandleRequest[T](Func`1 request)
The "Synchronization with MailChimp" scheduled task failed with the "An error occurred during synchronization with MailChimp" error (Task type...
Nop.Core.NopException: An error occurred during synchronization with MailChimp
at Nop.Plugin.Misc.MailChimp.Services.SynchronizationTask.Execute()
at Nop.Services.Tasks.Task.ExecuteTask() in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Services\Tasks\Task.cs:line 54
at Nop.Core.Caching.MemoryCacheManager.PerformActionWithLock(String key, TimeSpan expirationTime, Action action) in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Core\Caching\MemoryCacheManager.cs:line 178
at Nop.Services.Tasks.Task.Execute(Boolean throwException, Boolean ensureRunOncePerPeriod) in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Services\Tasks\Task.cs:line 130
An error occurred during synchronization with MailChimp
Nop.Core.NopException: An error occurred during synchronization with MailChimp
at Nop.Plugin.Misc.MailChimp.Services.SynchronizationTask.Execute()
at Nop.Services.Tasks.Task.ExecuteTask() in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Services\Tasks\Task.cs:line 54
at Nop.Core.Caching.MemoryCacheManager.PerformActionWithLock(String key, TimeSpan expirationTime, Action action) in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Core\Caching\MemoryCacheManager.cs:line 178
at Nop.Services.Tasks.Task.Execute(Boolean throwException, Boolean ensureRunOncePerPeriod) in D:\PerfBegin\Web\NOP\4.30_Sources\Libraries\Nop.Services\Tasks\Task.cs:line 130
at Nop.Web.Areas.Admin.Controllers.ScheduleTaskController.RunNow(Int32 id) in D:\PerfBegin\Web\NOP\4.30_Sources\Presentation\Nop.Web\Areas\Admin\Controllers\ScheduleTaskController.cs:line 115