Hi all
I'm using my own subscription provider which inherits from the Newsletterstudio SubscriptionProviderBase and referenced it in the newsletterStudio.config file:
The NewsletterStudio version I'm using is 2.1.4.0.
Most of the time sending Newsletter works absolutely fine.
But sometimes it doesn't and the following errormessages are visible in the Log-File:
"NewsletterStudio: Cound not load subscription-providers. Please check configuration."
and
"NewsletterStudio, SendNewsletterService: Sequence contains no matching element : at System.Linq.Enumerable.First[TSource](IEnumerable`1 source, Func`2 predicate)
at NewsletterStudio.Bll.Providers.SubscriptionProviderFactory.GetProviderByName(String uniqName)
at NewsletterStudio.Bll.Providers.SubscriptionProviderFactory.GetReceiversBySubscriptionAlias(String value, SendOutParams parameters)
at NewsletterStudio.Services.EmailTrackingItemService.CreateTrackingItems()
at NewsletterStudio.Services.SendNewsletterService.SendEmails()"
Unfortunately the exception for the first error message is not thrown, so I'm unable to analyze where the problem appears. Finally I think the subscription provider can not be loaded somehow.
The only thing I figured out is, that this time the problem appears, the Umbraco Member groups in the "Send e-mail right now"-Tab from Newsletterstudio are not there.
Does anybody has an idea what could be the problem?
Thanks for your replies