Answers.Body: <p>This may be related to <a href="https://civicrm.stackexchange.com/questions/19366/status-page-angular-load-error/19597#19597">Status page angular load error</a>. Make sure that the following two items point to the same place:</p>
  
  <ul>
  <li><strong>Image Upload URL</strong> at Administer > System Settings > Resource URLS</li>
  <li><strong>Image Directory</strong> at Administer > System Settings > Directories</li>
  </ul>
  
  <p>If this doesn't work, try disabling <strong>Asset Caching</strong> at Administer > System Settings > Debugging and Error Handling until this bug is fixed.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-12-19T03:27:24.323Z
Answers.Text: I am having this exact same problem.  The Image upload URL and the Image Directory are the same as they should be. I disabled Asset Caching and everything appears to load properly now.  I am concerned though. Would it cause problems to operate with Asset Caching disabled?
Answers.UserDisplayName: fdarn
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-07-24T19:58:55.233Z
Answers.LastActivityDate: 2017-07-24T19:58:55.233Z
Answers.UserDisplayName: Noah Miller
Body: <p>I am using CiviCRM 4.7.21, on Drupal 7.56.
  I am attempting to send a monthly mail-out.  If I choose last month's mail-out and click the "re-use" button, I get a blank screen:
  <a href="https://i.sstatic.net/3CfUE.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/3CfUE.png" alt="blank CiviCRM screen"></a></p>
  
  <p>If I go to mailings->draft, my new mailing is listed there.  If I then click "continue", it goes to the same blank screen.  If I try using mailings->new mailing, again the same blank screen, and a new draft mailing that I can't edit.
  This problem seems to have come up since I updated from 4.7.20 to 4.7.21 (updated 2 weeks ago, but this is the first new mailing we're trying to create since then).
  If more information is needed in order to reply, please tell me how/where to find it.</p>
  
  <p>thanks,
  CMD</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-07-24T20:27:13.053Z
Comments.Text: for drupal version try /admin/reports/status
Comments.UserDisplayName: petednz - fuzion
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-07-25T03:46:50.960Z
Comments.Text: thanks!  I found out we're on Drupal 7.56; 
  also found out I have a page full of warning messages to look at ;(
Comments.UserDisplayName: CathyD
Tags: <civimail><upgrade><error><4.7.21>
Title: screen for composing a mail is blank
ThreadText: # screen for composing a mail is blank
  
  (Asked by: username_0 on 2017-07-22)
  
  I am using CiviCRM 4.7.21, on Drupal 7.56.
  I am attempting to send a monthly mail-out. If I choose last month's mail-out and click the "re-use" button, I get a blank screen:
  [![blank CiviCRM screen](https://i.sstatic.net/3CfUE.png)](https://i.sstatic.net/3CfUE.png)
  
  If I go to mailings->draft, my new mailing is listed there. If I then click "continue", it goes to the same blank screen. If I try using mailings->new mailing, again the same blank screen, and a new draft mailing that I can't edit.
  This problem seems to have come up since I updated from 4.7.20 to 4.7.21 (updated 2 weeks ago, but this is the first new mailing we're trying to create since then).
  If more information is needed in order to reply, please tell me how/where to find it.
  
  thanks,
  CMD
  
  **Tags:** civimail, upgrade, error, 4.7.21
  
  > **Comments:**
  > **username_1**: for drupal version try /admin/reports/status  
  > **username_0**: thanks!  I found out we're on Drupal 7.56;  also found out I have a page full of warning messages to look at ;(  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2017-07-24. Score: 11 | Accepted answer
  
  This may be related to [Status page angular load error](https://civicrm.stackexchange.com/questions/19366/status-page-angular-load-error/19597#19597). Make sure that the following two items point to the same place:
  
  * **Image Upload URL** at Administer > System Settings > Resource URLS
  * **Image Directory** at Administer > System Settings > Directories
  
  If this doesn't work, try disabling **Asset Caching** at Administer > System Settings > Debugging and Error Handling until this bug is fixed.
  
  > **Comments:**
  > **username_3**: I am having this exact same problem.  The Image upload URL and the Image Directory are the same as they should be. I disabled Asset Caching and everything appears to load properly now.  I am concerned though. Would it cause problems to operate with Asset Caching disabled?  
  
  ---
  
  