The latest versions of QGIS (versions 3 and above) don't support some plugins available in the QGIS 2 version.

  This is because some tools from QGIS 2 that haven't migrated yet.

   Some plugins may show some dependency errors as well. You can try putting your project in  WGS84/Web Mercator or the native projection before loading the base map from the QMS(QuickMapService) plugin.

    If not, the alternative option to load base maps into QGIS is using the XYZ tiles option in your QGIS browser Panel.
    Use XYZ tiles>>Right Click>> New Connection>> Enter Server URL(OSM,Bing etc)>> OK
   The links for some base maps are :
    OpenStreetMap: https://tile.openstreetmap.org/{z}/{x}/{y}.png
    Google Hybrid: https://mt1.google.com/vt/lyrs=y&x={x}&y={y}&z={z}
    Google Satellite: https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}

  

 You can also add the OSM layer as a layer in QuickMapService by giving the link in plugin settings.

   

   The latest versions of QGIS (versions 3 and above) don't support some plugins available in the QGIS 2 version.

  This is because some tools from QGIS 2 that haven't migrated yet.

   Some plugins may show some dependency errors as well. You can try putting your project in  WGS84/Web Mercator or the native projection before loading the base map from the QMS(QuickMapService) plugin.

    If not, the alternative option to load base maps into QGIS is using the XYZ tiles option in your QGIS browser Panel.
    Use XYZ tiles>>Right Click>> New Connection>> Enter Server URL(OSM,Bing etc)>> OK
   The links for some base maps are :
    OpenStreetMap: https://tile.openstreetmap.org/{z}/{x}/{y}.png
    Google Hybrid: https://mt1.google.com/vt/lyrs=y&x={x}&y={y}&z={z}
    Google Satellite: https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}

  

    You can also add OSM layer as a layer in QuickMapService by giving the link in plugin settings.