Invalid data source credentials for schedule refresh

[Gracie]

I published my report to Power BI and then I want to schedule refresh. But it says that my data source credentials are not valid. Pleaser refer to below img. My data source is sql server database and csv and excel file. I didn't change the credentials.  Can somebody help me to solve this problem? Thanks.

[GilbertQ]

Hi there it would appear that you are using the Personal Gateway, so due to this you would be required to enter your credentials again.

If you want to avoid this you would need to install and configure the On-Premise Gateway.

[Gracie]

To be honest, I don't habe any gateway installed. This is the reason??

[GilbertQ · Accepted solution]

Yes that would be the reason, in order to refresh you need to have either the On-Premise Gateway or the Personal Gateway installed.

Here is the link for the Gateways: https://powerbi.microsoft.com/en-us/documentation/powerbi-gateway-onprem/