When I try to add a new WMS Layer from an URL into QGIS, it seems I can add the layer but when I try to open it I get the following error message: "invalid layer: raster layer data provider is invalid".
Any idea where the problem is? Is it the URL (which should be correct) or something with my QGIS. I'm using the QGIS 3.4.6 Version.
the WMS URL used was: "https://www.wms.nrw.de/gd/bk050?"
I have not used an other Provider because it is the only one I know for these data