Fix the issue Unable to display this web part

Unable to display this web part. To troubleshoot the problem, open this web page in a Microsoft SharePoint Foundation-Compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web Server Administrator. Correlation ID

Error: Unable to display this web part. To troubleshoot the problem, open this web page in a Microsoft SharePoint Foundation-Compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web Server Administrator. Correlation ID.

Solution

This error occurs when the “AllowPersonalization” property of the Web Part Zone is set to false, and a user with less privilege tries to access the zone. This leads to the WebPartPageUsageException. This could be overcome by just setting the AllowPersonalization property to true.