Using QGIS version 3.4.4 when loading a NetCDF file out.nc which contains multiple variables on a fresh Ubuntu 18.04 install I encounter the following error:
CRITICAL Invalid Layer : Raster layer Provider is not valid (provider: gdal, URI: out.nc
The same file load correctly on another 18.04 Ubuntu environment with more package setup. Unfortunately I cannot find which package is making the difference. The
libgdal package seems to be the same on both environments.