xarray 0.20 throwing exception

xarray/backends/plugins.py", line 105, in list_engines
    entrypoints = entry_points().get("xarray.backends", ())
AttributeError: 'EntryPoints' object has no attribute 'get'

dependencies.xml

@@ -40,7 +40,7 @@ Note all install methods after "main" take
     <scipy>1.7</scipy>
     <scikit-learn>1.0</scikit-learn>
     <pandas>1.3</pandas>
-    <xarray>0.20</xarray>
+    <xarray>0.19</xarray>
     <netcdf4>1.5</netcdf4>
     <matplotlib>3.3</matplotlib>
     <statsmodels>0.13</statsmodels>