ArcGIS Online: Incompatible with current basemap

Error Message

When opening a layer in Map Viewer, the layer is not added and the following error is returned:

Error:
Incompatible with current basemap.

When hovering over the  symbol, the following warning is displayed.

Error:
This layer's spatial reference is incompatible with the spatial reference of the basemap.

Cause

This is an expected behavior. Different basemaps use different spatial references. When a layer using a different spatial reference is opened in Map Viewer, the layer fails to be added into the map. In the example above, the tile layer is not compatible with the default World Topographic Map basemap.

Solution or Workaround

There are two potential workarounds to add the layer. Use one of the following solutions to solve the issue:

• Use a different basemap and add the layer. Refer to ArcGIS Online: Choose a basemap for instructions.
• Republish the feature layer with a different coordinate system. Refer to ArcGIS Pro: Work with coordinate systems for instructions.