You are sharing a layer that has a timestamp offset field. Sharing a web feature layer that copies all data to ArcGIS Enterprise is not supported when the field is visible.
Solutions
Do one of the following:
- Hide the field.
Hover over the analyzer message. Click the Options button
that appears and click Open Fields View. In the Visible column, uncheck the check box that corresponds to the timestamp offset field. On the Fields tab, in the Manage Edits group, click Save 
.Note:
Hidden fields cannot be used for authoring, such as configuring definition queries or labels on a layer.
- Use the Convert Temporal Field tool to convert the timestamp offset field to the date field type. Hide the field after it is converted.
- Share a web feature layer that references registered data instead.
Additional information
For more information, see Analyze your GIS resource.