When trying to connect to a Sharepoint online list as a data source, I am promted for the site URL which I provide (https://<myorg>.sharepoint.com/sites/Cloud3.0) and select the "2.0 (Beta)" implemen...
v-lili6-msft
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I have tested on my side, it works well.
I just use this link https://xxxxxxus.sharepoint.com/sites/jiayi1108 in sharepoint online list, then sign in by "Microsoft Account".
Try to uninstall and reinstall the latest version power bi desktop.
https://www.microsoft.com/en-us/download/details.aspx?id=58494
if that doesn't work try to find Microsoft.Web.WebView2.Core.dll on system and then copy into the "bin" folder of the Power BI installation.
https://developer.microsoft.com/en-us/microsoft-edge/webview2/
and also you could have a look this post:
https://community.powerbi.com/t5/Issues/Unable-to-refresh/idc-p/1839434#M66563
Regards,
Lin