SharePoint error. Underlying connection was closed

[BrittanyBI]

I have used SharePoint to combine files within a SharePoint folder for over a year and for some strange reason I just started getting the following error message causing my entire data model to fail. Please lead me in the right direction.

SharePoint: Request failed: The underlying connection was closed: An unexpected error occurred on a send.

[v-xiaoyan-msft]

Hi @BrittanyBI ,

During my investigation, the issue seems not belong to Power BI side but sharepoint.

You may open a support ticket in SharePoint.

Also, you may check these thread to see if them help

error: The underlying connection was closed: An unexpected error occurred on a send - Microsoft Q&A

May 2021 Gateway Error: SharePoint: Request failed... - Microsoft Power BI Community

Best Regards,
Community Support Team _ Caitlyn

[BrittanyBI]

Thank you @v-xiaoyan-msft