Basic steps performed, Power BI desktop --> Get Data --> Online Service --> SharePoint Online List --> Site URL --> Click OK.
If you receive error "The remote server returned an error: (404) Not Found", refer here to fix.
⚠️ Clicking on Retry results in the same error.
⚠️ Clear permissions does not help.
⚠️ Re entering the password does not help.
Power BI error - Access forbidden
Unable to connect
We encountered an error while trying to connect.
Details: "Access to the resource is forbidden".
⛏️ How to fix Power BI access to resource forbidden error ?
The error occurs due to wrong Credential Type used, Anonymous by default. You need to use Organizational Microsoft Account for SharePoint Online.- Click 'Cancel' to exit the screen.
- From the Ribbon, click "Edit Queries" --> "Data source settings".
- Select your site and click Edit Permissions --> Edit.
- Select Microsoft account.
- Set Privacy level - Organizational.
- Sign in with your organizational Microsoft Office 365 account.
- Click Save.
- Click OK.
- Click Close.
- Resubmit the URL in the connection and you should see the SharePoint site lists in the Navigator.
Power BI - Data Source settings
Power BI - Data Source settings permissions

Power BI - Load Transform SharePoint List data
Clear permissions and try with above steps, this helps when there is a cache issues or password change issue.
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