[Bug] Loading dataframe is not working

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
Run the demo in jupyter notebook

import pandas as pd
import keplergl
df = pd.read_csv('hex_data.csv')
%run hex_config.py
w1 = keplergl.KeplerGl(height=400, data={'data_1': df}, config=config)
w1

**Expected behavior**
expected a map with hex information is shown

**Screenshots**
But it shows nothing. If data={'data_1': df} is removed, a map can be displayed


**Desktop (please complete the following information):**
- OS: Windows 10
- Browser: Chrome
- Version: 116

Run the provided Jupyter notebook reproduction with pandas data loaded and compare it with the version that omits data={'data_1': df}. Trace why the map does not render when the dataframe is supplied; done means the map displays the expected hex information with the dataframe loaded.

Written by the indexing model from the issue text.