When looking at data in vAnalytics, data from the previous day is not visible, but data from previous days is. Data collection is known to be working.
The data uploaded should processed over-night - Vyopta therefore maintains several systems to process uploaded data, with systems being configured to perform the processing at appropriate times.
If you see that your data is not present for the previous day then it is possible that your data processing should be moved to a system that processes in an appropriate timeframe.
Please raise a support ticket, mentioning this article and containing your timezone. If your data needs to be processed on another system then arrangements can be made to facilitate this.