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I was having difficulty with a Joomla! site and decided to move it to another server for testing. The Akeeba backup I had would not fully extract for some reason (a large backup file included in the backup), so I downloaded all 30k+ files manually via FTP and uploaded them directly to the new server. I, also, backed up the database via phpMyAdmin and restored it to the new server.

When I access the front-end of the website, everything loads and works as it should. However, when I access the administrator, I receive the following message after logging in:

Failed to start the session because headers have already been sent by "/home/userfolder/public_html/plugins/system/statusindicator/statusindicator.php" at line 169.

I cannot access any administrator pages after logging in. I've tried installing the Joomla! core over the top and that did not fix it. I've, also, tried resetting the db credentials and that did not fix it.

What could be the issue causing this error?

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  • BTW, I am testing this site on the new server by modifying my local hosts file.
    – Michael Yaeger
    Commented Jun 27, 2018 at 15:56
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    Hmm, this isn't a core Joomla plugin, so perhaps go to PhpMyAdmin, go to the #__extensions table and set enabled to 0 for plg_statusindicator. Then try accessing the page again. If it works, re-enabled it.
    – Lodder
    Commented Jun 28, 2018 at 16:10
  • Disabling it fixed the issue. However, as soon as I re-enable it the error comes back. I'm unsure why the plugin isn't causing the same error on the original server!
    – Michael Yaeger
    Commented Jun 29, 2018 at 12:39
  • BTW, this plugin is a part of the ActiveHelper chat server, so I can contact them directly from here. Post your comment as an answer and I'll mark it. Thanks!
    – Michael Yaeger
    Commented Jun 29, 2018 at 12:41
  • Asking Lodder to post his comment as a solution is not recommended because it is not actually a solution. If you eventally figure out how to ob_start() or similar output buffer technique to allow the header, then feel free to post an educational answer and mark that with the big green tick. However, I feel that the best solution is to manually shift the lines of code that precede session_start() to alleviate the issue... session_start() is always recommended to be the first line of code (following <?php) on any script that intends to use or maintain session data.
    – mickmackusa
    Commented Jul 17, 2018 at 11:58

1 Answer 1

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To solve this issue, I used PhpMyAdmin to edit the #__extensions table. I set 'enabled' to '0' for 'plg_statusindicator'. I was, then, able to access the administrator. (Thanks, @Lodder!)

Unfortunately, the plugin continued to throw the error when accessing the administrator if re-enabled. Apparently, there is some server setting on the new server that is not allowing the plugin to function as it did on the live server. Fortunately, I could just leave it disabled for testing.

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