xarry netcdf message

[Jorge Conrado Conforte Conforte]

Hi,

I'm reading my netcdf data air.2m.mon.ltm.nc.
I used the netcdf4 and I didn't have message when i read my data. But if I
use the xarray I had this message:

/home/conrado/.conda/envs/meuambi/lib/python3.8/site-packages/xarray/backends/plugins.py:61:
RuntimeWarning: Engine 'cfgrib' loading failed:
module 'cfgrib.messages' has no attribute 'DEFAULT_INDEXPATH'
  warnings.warn(f"Engine {name!r} loading failed:\n{ex}", RuntimeWarning)
/home/conrado/.conda/envs/meuambi/lib/python3.8/site-packages/xarray/coding/times.py:673:
SerializationWarning: Unable to decode time axis into full numpy.datetime64
objects, continuing using cftime.datetime objects instead, reason: dates
out of range
  dtype = _decode_cf_datetime_dtype(data, units, calendar, self.use_cftime)
/home/conrado/.conda/envs/meuambi/lib/python3.8/site-packages/xarray/core/indexing.py:423:
SerializationWarning: Unable to decode time axis into full numpy.datetime64
objects, continuing using cftime.datetime objects instead, reason: dates
out of range
  return np.asarray(array[self.key], dtype=None)

What can I do to solve this message.

Thanks,

Conrado