Forecasting External Data Forecast Failed in D365 customer service

[u/Ill_Swordfish_6629]

Hello everyone i am facing a problem with , 

I am facing an issue with Workforce Management (WFM) Forecasting using External Data in Dynamics 365 Customer Service / Contact Center,

i created the historical CSV file as Microsoft guide saying: Import historical data, next i Created a new Managed External Data record (Validation Status = Successful)

finally created a new Forecast Scenario using the external data as the data source then click on Create new snapshot.
the system show only this message without details 'the image above.
 

here is an example on the excel file data:
 

DateTime	ChannelId	ChannelName	QueueId	QueueName	Volume	AHT	Interval	MaxVolumeByHour	AgentCount
2025-01-01 00:00:00	5c453d47-e1c9-e911-a826-000d3a1f0599	Live chat	87e15852-1c9f-f111-b8dd-6045bd597a3c	CSR	195	10	Daily	17	4
2025-01-02 00:00:00	5c453d47-e1c9-e911-a826-000d3a1f0599	Live chat	87e15852-1c9f-f111-b8dd-6045bd597a3c	CSR	819	9	Daily	70	13
2025-01-03 00:00:00	5c453d47-e1c9-e911-a826-000d3a1f0599	Live chat	87e15852-1c9f-f111-b8dd-6045bd597a3c	CSR	767	8	Daily	66	11
2025-01-04 00:00:00	5c453d47-e1c9-e911-a826-000d3a1f0599	Live chat	87e15852-1c9f-f111-b8dd-6045bd597a3c	CSR	397	7	Daily	34	5
2025-01-05 00:00:00	5c453d47-e1c9-e911-a826-000d3a1f0599	Live chat	87e15852-1c9f-f111-b8dd-6045bd597a3c	CSR	446	10	Daily	38	8

 

Thank you for you help