Answers.Body: <p>That error indicates that Craft is missing some files (or they are corrupted) in its <code>craft/app</code> folder.  You can download a fresh copy of Craft from <a href="https://craftcms.com" rel="nofollow">https://craftcms.com</a> and replace your existing <code>craft/app</code> folder with the new one and that should resolve it.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-01-27T08:41:35.677Z
Answers.Text: I see. I've tried replace app folder, and it's working now. Thank you.
Answers.UserDisplayName: Marissa Azaria
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-01-26T22:00:33.700Z
Answers.LastActivityDate: 2016-01-26T22:00:33.700Z
Answers.UserDisplayName: Brad Bell
Body: <p>I'm getting white blank page when trying to access my website and Craft login page. I haven't updated the website for few months. So I assume no files has been changed.</p>
  
  <p>I checked with the hosting provider, and they say everything is okay on their part. </p>
  
  <p>So I turned on the Dev Mode. And it came back with this error :
  <code>Fatal error: Class 'Craft\HttpRequestService' not found in /home/alpw7814/craft/app/framework/YiiBase.php on line 213</code></p>
  
  <p>What could possibly cause this? Is there anything I need to check?
  Thank you in advance.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-26T10:35:26.747Z
Comments.Text: Sounds like some of your core files are missing (or corrupted). Have you tried to re-download Craft; replacing the `/craft/app` folder with a fresh copy?
Comments.UserDisplayName: Mats Mikkel Rummelhoff
Tags: <error>
Title: White blank page when accessing website and Craft login page
ThreadText: # White blank page when accessing website and Craft login page
  
  (Asked by: username_0 on 2016-01-26)
  
  I'm getting white blank page when trying to access my website and Craft login page. I haven't updated the website for few months. So I assume no files has been changed.
  
  I checked with the hosting provider, and they say everything is okay on their part.
  
  So I turned on the Dev Mode. And it came back with this error :
  `Fatal error: Class 'Craft\HttpRequestService' not found in /home/alpw7814/craft/app/framework/YiiBase.php on line 213`
  
  What could possibly cause this? Is there anything I need to check?
  Thank you in advance.
  
  **Tags:** error
  
  > **Comments:**
  > **username_1**: Sounds like some of your core files are missing (or corrupted). Have you tried to re-download Craft; replacing the `/craft/app` folder with a fresh copy?  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2016-01-26. Score: 1
  
  That error indicates that Craft is missing some files (or they are corrupted) in its `craft/app` folder. You can download a fresh copy of Craft from <https://craftcms.com> and replace your existing `craft/app` folder with the new one and that should resolve it.
  
  > **Comments:**
  > **username_0**: I see. I've tried replace app folder, and it's working now. Thank you.  
  
  ---
  
  