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raise TimeoutException(message, screen, stacktrace) selenium.common.exceptions.TimeoutException: Message: Assertion failed

I have a problem with Selenium Webdriver, trying to locate the element, the program gives an error "raise TimeoutException(message, screen, stacktrace) selenium.common.exceptions.TimeoutException: Message: Assertion failed"

My code is with a page-object model: My code: 1st part -

  def located_element(self, locator):
        wait = WebDriverWait(self.driver, 30)
        element = wait.until(EC.presence_of_element_located(locator))
        return element
2nd part
 def enter_email(self, user):
        email_field = self.located_element(self.locator.Email)
        email_field.click()
        email_field.send_keys(Users.get_user(user)["email"])
3rd(running) 
I have tried some recommendations from related issues but it didn't help me. At first, it couldn't find the element, that's why I added EC, but now it raises an error. Please, help me, how can I handle the Exception. I have tried the locator both with xpath and css-selector too. 
                Thank you for your answer. The css selector I used - Email = (By.CSS_SELECTOR, "input.input-error") and Xpath = "//input [@class = 'input-error']"    and html:  <input placeholder="" autocomplete="" type="email" name="email" class="input-error">
– Hermine
                Feb 19, 2020 at 6:40
                let me copy the whole html code:        <script>     gbCommonInfo.pageType = 'login' </script> <div class="outermost-vue-loading vue-loading-login j-vue-loading-login"></div> <div class="c-login container-fluid-1200 j-login-container she-v-cloak-none" v-cloak>     <div class="row">         <div class="c-forgotpsd col-xs-10 col-xs-offset-1" v-show='forgetPassword.showForm'>     <h2>Forgotten Password</h2> There aren'n any tags here.
– Hermine
                Feb 19, 2020 at 6:54
                Does wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "input.input-error"))) work? try it directly, without passing it as a parameter.
– Guy
                Feb 19, 2020 at 7:00
        
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