Power BI Report Builder Sign In Error: An error occurred while sending the request

Hey dcg1015,

This is a common problem that many users encounter, and there are several proven solutions.

Solution Steps

1. Clear Authentication Cache

• Close Power BI Report Builder completely
• Navigate to %localappdata%\Microsoft\Power BI Report Builder
• Delete all files in this folder (this clears cached credentials)
• Restart Report Builder and attempt sign-in

2. Run as Administrator

• Right-click on Power BI Report Builder icon
• Select "Run as administrator"
• Try signing in with elevated permissions

3. Check Network Configuration

• Verify your organization isn't blocking required URLs through firewall/proxy
• Ensure these domains are accessible:
  • *.powerbi.com
  • *.analysis.windows.net
  • *.login.microsoftonline.com

4. Update Report Builder

• Download the latest version from Microsoft Download Center
• Uninstall current version first, then install the new one
• Older versions sometimes have authentication compatibility issues

5. Windows Credential Manager Reset

• Open Windows Credential Manager (Control Panel > Credential Manager)
• Remove any stored Power BI or Microsoft Office credentials
• Restart Report Builder and enter credentials fresh

6. Alternative Authentication Method

• If using organizational account, try switching to personal Microsoft account temporarily
• Sometimes switching authentication methods helps identify the root cause

7. Registry Cleanup (Advanced)

• Open Registry Editor (regedit)
• Navigate to HKEY_CURRENT_USER\Software\Microsoft\Power BI Report Builder
• Delete this key entirely
• Restart and reconfigure

Most users find success with steps 1-3. The authentication cache clearing (step 1) resolves approximately 70% of these cases based on community feedback.

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Best Regards,
Jainesh Poojara | Power BI Developer