ArcGIS Workforce mobile worker maps are enabled for offline use with the default basemap but the offline map areas cannot be packaged.

Workaround

Replace the mobile worker basemap with an offline-capable basemap. To use an Esri basemap offline, follow the steps outlined in the documentation: https://enterprise.arcgis.com/en/portal/latest/use/take-maps-offline.htm#ESRI_SECTION1_C0331D55CAE14D4FAB1B54354A9246F2:~:text=Use%20an%20Esri%20basemap%20offline.

Steps to Reproduce