AttributeError 'Nonetype' object has no attributes 'send keys'

I am trining to upload the files in the share directory. after the browse window open unable to add the files and confirm.

Please check the below code and put some light on it.

from selenium import webdriver
import time
import os

options=webdriver.chromeoptions()
options.add_experimental_option('useAutomationExtension' Flase)
driver=webdriver.chrome(options=options,executable_path=r "c:\Driver\chromedriver.exe"
driver.get('http//**********'
browser_v=("//*****************")
browser=webdriverWait(driver,20).untill(EC.element_to_be_clickable((By.XPATH,browser_v))).click()
time .sleep(5)
browser.send_keys(local_dir+'folder.zip')

When the send key request is triggered then Error
AttributeError: NoneType object has no attributes ‘send keys’

browser opwn files window pop up and then nothing happens. Send key values are nor prompted.

WebDriverWait statement is not written in correct syntax, I guess