Newsletter Studio works with all versions Umbraco higher than 4.7+ this means that things sometimes can go wrong.
Most of the time problems are related to upgrades or changes in the Umbraco core.
When trying to find out what's wrong there are some great steps to follow to try to find out what's wrong.
Many of the rows in the Newsletter Studio db has statuses that are stored as numbers (ints). Here is a list of the different statuses and what they mean:ns_Newsletter statuses:Created = 0Paused = 1InProgress = 2Error = 3 Completed = 4ns_EmailTrackingItems statues:Ready = 0InProgress = 1Error = 2…