TypeError: object of type 'numpy.int64' has no len() with Excel data

Question

I'm currently working on automating some forms, and I got results, where all the fields were working and getting data from an Excel spreadsheet.

This is how I'm setting the fields:

for i in tabela.index:
    NStaff = tabela.loc[i, "NStaff"]
    NProf = tabela.loc[i, "NProf"]
    NCONV = tabela.loc[i, "NConv"]
    NColab = tabela.loc[i, "NColab"]
    NAlun = tabela.loc[i, "NAlunos"]
    NBenef = tabela.loc[i, "NBenef"]

This used to work and I have 12 other fields before them (radios, checkboxes, calendars, texts) all working.

But now I'm getting this error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_8560/1476198016.py in <module>
    153     navegador.find_element(By.XPATH, '/html/body/div/div/div/div/div[1]/div/div[1]/div[2]/div[2]/div[11]/div/div[2]/div/div[2]/div/label/input').click()
    154 
--> 155 navegador.find_element(By.XPATH, '/html/body/div/div/div/div/div[1]/div/div[1]/div[2]/div[2]/div[12]/div/div[2]/div/div/input').send_keys(NStaff)
    156 navegador.find_element(By.XPATH, '/html/body/div/div/div/div/div[1]/div/div[1]/div[2]/div[2]/div[13]/div/div[2]/div/div/input').send_keys(NProf)
    157 navegador.find_element(By.XPATH, '/html/body/div/div/div/div/div[1]/div/div[1]/div[2]/div[2]/div[14]/div/div[2]/div/div/input').send_keys(NColab)

~\anaconda3\lib\site-packages\selenium\webdriver\remote\webelement.py in send_keys(self, *value)
    539 
    540         self._execute(Command.SEND_KEYS_TO_ELEMENT,
--> 541                       {'text': "".join(keys_to_typing(value)),
    542                        'value': keys_to_typing(value)})
    543 

~\anaconda3\lib\site-packages\selenium\webdriver\common\utils.py in keys_to_typing(value)
    146                 typing.append(val[i])
    147         else:
--> 148             for i in range(len(val)):
    149                 typing.append(val[i])
    150     return typing

TypeError: object of type 'numpy.int64' has no len()
-----

Anyone could give me any tips?