Matrix field breaks backend Entries > 'page-name' page. "Endless" recursion error?
Brad was right, it was xDebug that was the culprit. So here's what I did:


In the Linux terminal I ran:

sudo gedit /etc/php5/mods-available/xdebug.ini

In the xdebug.ini file I added the line below and saved.

xdebug.max_nesting_level=256

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.