Symptoms
A web part or web form control on the web part page cannot be displayed. Additionally, the web part or web form control generates the following error message and "6ipo0" event tag in SharePoint Unified Logging System (ULS) logs:
Found an unsafe PropertyName: <UnsafePropertyName>
Cause
This issue occurs because an unsafe property name is set for the DataFormParameter property that is not supported by the web part.
Workaround
If you are the farm administrator, you can work around this issue by running the following commands to add the property name to the WebPartSupportedSimplePropertyNames list:
add-pssnapin *
$f=get-spfarm
$f.AddGenericAllowedListValue("WebPartSupportedSimplePropertyNames","<UnsafePropertyName>")
$f.update()
