MissingDataError: exog contains inf or nans - missing-data

Question

Input:
import statsmodels.api as sm
import pandas as pd
# reading data from the csv
data = pd.read_csv('/Users/justkiddings/Desktop/Python/TM/TM.csv')
# defining the variables
x = data['FSP'].tolist()
y = data['RSP'].tolist()
# adding the constant term
x = sm.add_constant(x)
# performing the regression
# and fitting the model
result = sm.OLS(y, x).fit()
# printing the summary table
print(result.summary())
Output:
runfile('/Users/justkiddings/Desktop/Python/Code/untitled28.py', wdir='/Users/justkiddings/Desktop/Python/Code')
Traceback (most recent call last):
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/spyder_kernels/py3compat.py", line 356, in compat_exec
exec(code, globals, locals)
File "/Users/justkiddings/Desktop/Python/Code/untitled28.py", line 24, in <module>
result = sm.OLS(y, x).fit()
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/regression/linear_model.py", line 890, in __init__
super(OLS, self).__init__(endog, exog, missing=missing,
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/regression/linear_model.py", line 717, in __init__
super(WLS, self).__init__(endog, exog, missing=missing,
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/regression/linear_model.py", line 191, in __init__
super(RegressionModel, self).__init__(endog, exog, **kwargs)
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/model.py", line 267, in __init__
super().__init__(endog, exog, **kwargs)
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/model.py", line 92, in __init__
self.data = self._handle_data(endog, exog, missing, hasconst,
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/model.py", line 132, in _handle_data
data = handle_data(endog, exog, missing, hasconst, **kwargs)
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/data.py", line 673, in handle_data
return klass(endog, exog=exog, missing=missing, hasconst=hasconst,
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/data.py", line 86, in __init__
self._handle_constant(hasconst)
File "/Users/justkiddings/opt/anaconda3/lib/python3.9/site-packages/statsmodels/base/data.py", line 132, in _handle_constant
raise MissingDataError('exog contains inf or nans')
MissingDataError: exog contains inf or nans
Some of the Data:
DATE,HOUR,STATION,CO,FSP,NO2,NOX,O3,RSP,SO2
1/1/2022,1,TUEN MUN,75,38,39,40,83,59,2
1/1/2022,2,TUEN MUN,72,35,29,30,90,61,2
1/1/2022,3,TUEN MUN,74,38,28,30,91,66,2
1/1/2022,4,TUEN MUN,76,39,31,32,79,61,2
1/1/2022,5,TUEN MUN,72,38,25,26,83,65,2
1/1/2022,6,TUEN MUN,74,37,24,25,86,60,2
I have removed the N.A. in my dataset and they have converted into blanks. (Eg. 3/1/2022,12,TUEN MUN,85,,53,70,59,,5) Why there is MissingDataError? How to fix it? Thanks.