Selenium python Error: element could not be scrolled into view

I am working on automating the IdentiGO application for my company, and I'm getting the following error:

Internal Server Error: /identigo
Traceback (most recent call last):
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/views/generic/base.py", line 97, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/jane/Code/maynard_env/maynard/employee/views.py", line 63, in post
    driver.main(employee)
  File "/Users/jane/Code/maynard_env/maynard/employee/driver.py", line 31, in main
    WebDriverWait(driver, 1000000).until(EC.presence_of_element_located((By.XPATH, '/html/body/div[5]/div[3]/div/button/span'))).click()
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/selenium/webdriver/remote/webelement.py", line 80, in click
    self._execute(Command.CLICK_ELEMENT)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/selenium/webdriver/remote/webelement.py", line 633, in _execute
    return self._parent.execute(command, params)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.ElementNotInteractableException: Message: Element <span class="ui-button-text"> could not be scrolled into view

Here is my code, with the scripts leading up to this page omitted since they aren't relevant to my problem.

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC


WebDriverWait(driver, 1000000).until(EC.presence_of_element_located((By.XPATH, '/html/body/div[5]/div[3]/div/button/span'))).click()

On the page prior to this code, where the user selects an appointment date and time; I want the script to wait for the "Go" button to be pushed, then click on "Continue" in the following screenshot:

If you would like to see the exact page, go to this url, then you will have to make a series of POST requests using the following info:

• click schedule a new appointment
• other
• vendors and contractors (children)
• tvnc00047
• 37204
• make random appointment date

Any advice would really be appreciated!

Update

Here is a JS Fiddle with the html of the page:

https://jsfiddle.net/khf4tym3/

When I click "view page source", the popup html doesn't show in the source code, so I assume that it is generated with JS.

<div class="ui-dialog-buttonset">
    <button type="button" class="ui-button ui-widget ui-state-default ui-corner-all ui-button-text-only" role="button" aria-disabled="false">
        <span class="ui-button-text">Continue</span>
    </button>
</div>

Update 2

If I change the line WebDriverWait(driver, 1000000) to WebDriverWait(driver, 30), I get the following error instead:

Internal Server Error: /identigo
Traceback (most recent call last):
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/django/views/generic/base.py", line 97, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/jane/Code/maynard_env/maynard/employee/views.py", line 63, in post
    driver.main(employee)
  File "/Users/jane/Code/maynard_env/maynard/employee/driver.py", line 34, in main
    element=WebDriverWait(driver,30).until(EC.element_to_be_clickable((By.XPATH,"//div[@class='ui-dialog-buttonset']/button[@class='ui-button ui-widget ui-state-default ui-corner-all ui-button-text-only']/span[contains(.,'Continue')]")))
  File "/Users/jane/Code/maynard_env/env/lib/python3.7/site-packages/selenium/webdriver/support/wait.py", line 80, in until
    raise TimeoutException(message, screen, stacktrace)
selenium.common.exceptions.TimeoutException: Message: 

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