when i run the drone2map program,the program tell me that" the current authertication portal has no valid default basemap.an empty basemap has been loaded"
like the picture

can you tell me how to resolve the problem?
thanks
dm2.log:
2017-02-21 16:24:00,457 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 16:24:36,515 INFO - Runtime Licensed
2017-02-21 16:36:17,843 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 16:36:45,858 INFO - Runtime Licensed
2017-02-21 16:38:35,318 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 16:38:59,543 INFO - Runtime Licensed
2017-02-21 16:47:05,454 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 16:48:36,157 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 16:53:38,954 INFO - Adding sharing portal https://www.arcgis.com
2017-02-21 17:01:31,844 INFO - Adding sharing portal https://www.arcgis.com