00064: Layer has a join—ArcGIS Server | Documentation for ArcGIS Enterprise

Your layer has a join. Layers containing joined data cannot be published with Feature Access (feature service) enabled.

Solution

One way to keep the attributes of the joined table in the layer you want to publish is to create a view. A view is a stored query that selects data from specified tables.
Learn more about views and creating a database view in ArcGIS Desktop
Or, you could export your layer with the join to a new feature class and use this new feature class in the map you want to publish.
1. Right-click the layer in the table of contents.
2. Click Data from the context menu.
3. Click Export Data from the pull-right menu.
Alternatively, you can remove the joins from your layer.
1. Open the Layer Properties dialog box.
2. Click the Joins & Relates tab.
3. Click Remove.