Fix querying exposure coords in CalcDeltaImpact

Author: peanutfun

climada/engine/unsequa/calc_delta_climate.py

@@ -281,7 +281,9 @@ def uncertainty(
 
         if calc_eai_exp:
             exp = self.exp_final_input_var.evaluate()
-            coord_df = exp.gdf[["latitude", "longitude"]]
+            coord_df = pd.DataFrame.from_dict(
+                {"latitude": exp.latitude, "longitude": exp.longitude}
+            )
         else:
             coord_df = pd.DataFrame([])