[Tickets #14121] Administration/Configuration throws error: Call to a member function hasChildNodes() on a non-object in ${INSTALL_PATH}/Horde/Config.php on line 203

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Ticket URL: https://bugs.horde.org/ticket/14121
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  Ticket             | 14121
  Created By         | robert.kovacs.it at gmail.com
  Summary            | Administration/Configuration throws error: Call to a
                     | member function hasChildNodes() on a non-object in
                     | ${INSTALL_PATH}/Horde/Config.php on line 203
  Queue              | Horde Base
  Version            | FRAMEWORK_5_2
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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robert.kovacs.it at gmail.com (2015-09-30 08:15) wrote:


I am trying to use Horde Groupware 5.2.10 on RH 6.6.
I install a separate pear for horde into ${MYDIR}/horde
I install Horde to the same location, run all the necessary scripts, etc.

When I try to configure horde via ${MYURL}/horde/admin/config (the  
link that Administration/Configuration takes me to), I get an error on  
the page:
     CRITICAL ERROR: Registry could not be initialized from any value
I also get the 'non-object' error described in the summary in syslog.
If I manually rewrite the URL to  
${MYURL}/horde/admin/config/config.php?app=${APP}, then it works  
except save/etc. links that try to take me back to the non-working  
URL, where I have to manually rewrite again to make them work.

I also see the 'CRITICAL ERROR' when a user tries to log in to horde,  
but when refreshing the page after the error, the expected things show  
up and the login is fine.

The issue is present if I restore my old horde DB contents, as well as  
when I start with a clean mysql DB for horde. I also upgraded pear  
with 'pear upgrade pear', no changes.

This issue seems to be there since old versions (>=5.1.x ?).
I see people having the same issue in the past, e.g. in #12251
That ticket says the issue was resolved, but does not give any details  
about how.