Collector app basemap won't load

[TiffanySprague]

Hello, when we use our collector map, the basemap won't load although the location and points are still visible. 

[ThomasJones1]

Hello Tiffany Sprague‌

Are you singing into Collector through Portal or ArcGIS Online? Does the basemap load successfully in a web map? Are you using your own basemap or an Esri basemap?

Thanks.

Thomas.