Answers.Body: <p>Brad was right, it was xDebug that was the culprit. So here's what I did:</p>
  
  <ol>
  <li><p>In the Linux terminal I ran:</p>
  
  <pre><code>sudo gedit /etc/php5/mods-available/xdebug.ini
  </code></pre></li>
  <li><p>In the xdebug.ini file I added the line below and saved.</p>
  
  <pre><code>xdebug.max_nesting_level=256
  </code></pre></li>
  <li><p>In the Linux terminal I ran:</p>
  
  <pre><code>sudo service apache2 restart
  </code></pre></li>
  </ol>
  
  <p>Done.</p>
  
  <p><br>
  Note: if the this does not fix it, try changing the command in step 1 to:</p>
  
  <pre><code>sudo gedit /etc/php5/conf.d/xdebug.ini
  </code></pre>
  
  <p>or just edit your <em>php.ini</em> file where ever it may be located.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-03-16T07:32:26.823Z
Answers.LastActivityDate: 2016-03-16T08:24:54.667Z
Answers.LastEditDate: 2016-03-16T08:24:54.667Z
Answers.UserDisplayName: CodeMonkey
Body: <p>In backend Entries > 'page-name' I could only see the left nav side bar, and the top "header" bar (breadcrumbs + page name + save button), when ever there was a Matrix field on the page.<br>
  I noticed that the last line rendered (marked in blue) had a height of 0, so I started poking around in the CSS.
  <br></p>
  
  <p><a href="https://i.sstatic.net/SzSGO.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/SzSGO.png" alt="enter image description here"></a></p>
  
  <p>After disabling a <code>display: none;</code> (marked in green below) for the div immediately below the last div shown, I could see part of the page plus the error message shown in the screenshot below. </p>
  
  <p><a href="https://i.sstatic.net/7Homn.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7Homn.png" alt="enter image description here"></a></p>
  
  <p>To me, it looks like some "endless" recursion error.<br></p>
  
  <p>Does anyone have any idea on what might be going on here?</p>
  
  <p>Thanks in advance for any light you might shed on this!</p>
  
  <p>/Monkey</p>
  
  <p><em>Edit: added the top screenshot to show what the page looked like before I changed the CSS.</em></p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-03-15T15:51:12.503Z
Comments.Text: I've been dealing with this this morning too. Even the simplest Matrix field causes this recursion error.
Comments.UserDisplayName: Tim Knight
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-03-15T16:01:50.773Z
Comments.Text: It's somewhat comforting to know that I'm not alone in this. <=) I hope we will have a solution to this soon!
  I'm heading home now, so no more trouble shooting on my part until tomorrow morning. =/ I'll post if I've heard anything from support when I'm back at the office.
Comments.UserDisplayName: CodeMonkey
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-03-15T17:12:51.570Z
Comments.Text: Yup, that solution worked for me.
Comments.UserDisplayName: Tim Knight
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-03-16T07:48:28.743Z
Comments.Text: Same here, see answer below. Cheers Brad! ^^
Comments.UserDisplayName: CodeMonkey
Tags: <entries><matrix><admin>
Title: Matrix field breaks backend Entries > 'page-name' page. "Endless" recursion error?
ThreadText: # Matrix field breaks backend Entries > 'page-name' page. "Endless" recursion error?
  
  (Asked by: username_0 on 2016-03-15)
  
  In backend Entries > 'page-name' I could only see the left nav side bar, and the top "header" bar (breadcrumbs + page name + save button), when ever there was a Matrix field on the page.  
  I noticed that the last line rendered (marked in blue) had a height of 0, so I started poking around in the CSS.
  
  [![enter image description here](https://i.sstatic.net/SzSGO.png)](https://i.sstatic.net/SzSGO.png)
  
  After disabling a `display: none;` (marked in green below) for the div immediately below the last div shown, I could see part of the page plus the error message shown in the screenshot below.
  
  [![enter image description here](https://i.sstatic.net/7Homn.png)](https://i.sstatic.net/7Homn.png)
  
  To me, it looks like some "endless" recursion error.
  
  Does anyone have any idea on what might be going on here?
  
  Thanks in advance for any light you might shed on this!
  
  /Monkey
  
  *Edit: added the top screenshot to show what the page looked like before I changed the CSS.*
  
  **Tags:** entries, matrix, admin
  
  > **Comments:**
  > **username_1**: I've been dealing with this this morning too. Even the simplest Matrix field causes this recursion error.  
  > **username_0**: It's somewhat comforting to know that I'm not alone in this. <=) I hope we will have a solution to this soon! I'm heading home now, so no more trouble shooting on my part until tomorrow morning. =/ I'll post if I've heard anything from support when I'm back at the office.  
  > **username_1**: Yup, that solution worked for me.  
  > **username_0**: Same here, see answer below. Cheers Brad! ^^  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2016-03-16. Score: 0 | Accepted answer
  
  Brad was right, it was xDebug that was the culprit. So here's what I did:
  
  1. In the Linux terminal I ran:
  
     ```
     sudo gedit /etc/php5/mods-available/xdebug.ini
  
     ```
  2. In the xdebug.ini file I added the line below and saved.
  
     ```
     xdebug.max_nesting_level=256
  
     ```
  3. In the Linux terminal I ran:
  
     ```
     sudo service apache2 restart
  
     ```
  
  Done.
  
  Note: if the this does not fix it, try changing the command in step 1 to:
  
  ```
  sudo gedit /etc/php5/conf.d/xdebug.ini
  
  ```
  
  or just edit your *php.ini* file where ever it may be located.
  
  
  ---
  
  