selenium reload page source without refreshing the page (python)

Problem: I'm building a software using selenium which:

1. goes to a web page (a search page).
2. searches a term
3. the items get added to the search page dynamically
4. clicks on the first item
5. a pop up body happens with more info on that item which is a dynamic html added to the source
6. saves the info
7. Now I want to get out of that pop up, by clicking on an exit <button> using driver.find_element_*can't find the element without refreshing the page, because it was added to the page.

I've tried:

1. first try

WebDriverWait(driver,10).until(EC.element_to_be_clickable((By.CLASS_NAME, 'the class of the element')))
and
WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, 'class name')))

2. second try :

driver.page_source

3.second try : combination of both

WebDriverWait(driver,10).until(EC.element_to_be_clickable(By.CLASS_NAME, 'the class of the element'))
driver.page_source

In the case of wait().until(); I don't find the button element even though I can see it in the browser, till I get timed out.

Thank you in advanced.

EDIT: the website is upwork.com job search