Script de Selenium – ConnectionRefusedError: [Errno 61] Conexión rechazada

Ejecutando el script de Selenium que sigue, obtengo los siguientes errores: ConnectionRefusedError: [Errno 61] Conexión rechazada y urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f872820b490>: Fallo al establecer una nueva conexión: [Errno 61] Conexión rechazada. El script funcionaba correctamente y de repente empezó a suceder esto. ¿Tiene algo que ver con las solicitudes repetitivas?

Mi código:

url = "https://browzine.com/libraries/1374/subjects"

driver.get(url)
wait = WebDriverWait(driver, 10)

subj_list_xpath = "//span[@class='subjects-list-subject-name']"
subjects_avail = driver.find_elements(By.XPATH, subj_list_xpath)
journal_list_xpath = "//div[@class='image-container']"
journal_avail = driver.find_elements(By.XPATH, journal_list_xpath)
years_list_xpath = "//div[@class='year  tabindex' or @class='year selected tabindex']"
years_avail = driver.find_elements(By.XPATH, years_list_xpath)

amount_articles = 0
amount_jour = 0

for i in range(len(subjects_avail)):
    WebDriverWait(driver, 5).until(EC.visibility_of_element_located((By.XPATH, subj_list_xpath)))
    subjects_avail = driver.find_elements(By.XPATH, subj_list_xpath)
    ActionChains(driver).move_to_element(subjects_avail[i]).click(subjects_avail[i]).perform()
    for j in range(len(journal_avail)):
        WebDriverWait(driver, 5).until(EC.visibility_of_element_located((By.XPATH, journal_list_xpath)))
        journal_avail = driver.find_elements(By.XPATH, journal_list_xpath)
        ActionChains(driver).move_to_element(journal_avail[j]).click(journal_avail[j]).perform()
        amount_jour = amount_jour + 1
        print(amount_jour)
        for y in range(len(years_avail)):
            WebDriverWait(driver, 5).until(EC.visibility_of_element_located((By.XPATH, years_list_xpath)))
            years_avail = driver.find_elements(By.XPATH, years_list_xpath)
            ActionChains(driver).move_to_element(years_avail[y]).click(years_avail[y]).perform()