[Python] Folium + GeoPandas plot rendering Issue: missing geometries (despite existing)

Can someone help me understand why my approach for creating a basemap in folium with geopandas is problematic?

I have aggregated counts that I want to pass as a popup using folium and geopandas. I have a dummy example dataframe (gdf_raw) that has the 9 regions of interest, the geometry of the region (polygons), and a popup_info column with dummy entries. This one, while not clean, at least renders the base map.

But when I try using it on my intended counts with agg_gdf, I get the following error: "Cannot render objects with any missing geometries" f": {data!r}"

I don't understand why this is problematic though. The agg_gdf it has the same columns as the original, plus a column for date and a column for the count. Even if I remove those columns it errors as if geometry is missing, but from what I can tell the rows are populated with their appropriate polygons.

Any insight as to what I'm doing wrong?

Problematic Code:

folium.GeoJson(
agg_gdf,
name='geojson',
style_function=lambda feature: {
'fillColor': region_colors[feature["properties"]["region"]],
'color': 'black',
'weight': 2,
'fillOpacity': 0.5,
},

tooltip=folium.features.GeoJsonTooltip(
fields=["region"],
aliases=["Region:"],
localize=True,
),
popup=folium.features.GeoJsonPopup(
fields=["popup_info"],
aliases=["Region:"],
localize=True,
),

).add_to(base_map)


Code that works Fine:

folium.GeoJson(
gdf_raw,
name='geojson',
style_function=lambda feature: {
'fillColor': region_colors[feature["properties"]["region"]],
'color': 'black',
'weight': 2,
'fillOpacity': 0.5,
},

tooltip=folium.features.GeoJsonTooltip(
fields=["region"],
aliases=["Region:"],
localize=True,
),
popup=folium.features.GeoJsonPopup(
fields=["region"],
aliases=["Region:"],
localize=True,
),
).add_to(base_map)




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