Hello Allan Burek,
Since Widgets works in the test account, the original profile’s Widgets data may be damaged. However, Search is also affected in that profile, it may be worth treating that as a separate issue alongside the Widgets behavior.
First, open Windows Terminal, select PowerShell, and run:
Get-AppxPackage Microsoft.WidgetsPlatformRuntime | Reset-AppxPackage
Restart the computer and test Widgets again.
If that does not help, open Settings > Apps > Installed apps, find Microsoft Edge WebView2 Runtime, select the three-dot menu, and choose Modify > Repair. Widgets depend on WebView2 to display their content.
For Search, try Settings > Privacy & security > Searching Windows > Advanced indexing options > Advanced > Rebuild.
If Widgets remain blank, use the working test account as a temporary workaround. Since the problem appeared on build 26200.9457 despite a repair install, please also report it through Feedback Hub under Desktop Environment > Widgets, and submit Search separately under Desktop Environment > Search. This may help bring the issue to the attention of the relevant product team for further investigation.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas.