Subscriptions in Plesk > Subscriptions menu are marked with a red question mark despite the fact that resources are not exceeded.
An attempt to sync subscriptions with a Service plan fails:
Unable to sync subscriptions with the service plan.
The Daily Maintenance task has not been executed yet so subscriptions' resource usages were not updated.
Perform one of the following:
Force execution of the Daily Maintenance script so the resource usage is updated manually.
Wait for the Daily Maintenance tasks to execute at a scheduled timeframe.