Cant enter Backend --> Whitescreen

Dimebag · Post by **Dimebag** » Fri May 22, 2015 9:15 pm

Hi everyone,
i recently updated all the modules (all-in-one) via backend in an joomla 3.4.1 livesite, then i got a message:
"module install adapter does not exist"
since then i cant enter the backend, i only see a whitescreen without anything.

There must be happend a mistake during the moduleupdate.

Can anyone help me out since i don't know how to solve this?

http://www.chemnitz-lernt-fahren.de

Thanks in advance

jcms · Post by **jcms** » Sat May 23, 2015 6:03 am

login ftp, set error_reporting to maximum in configuration.php file and check more error.

Dimebag · Post by **Dimebag** » Sat May 23, 2015 7:30 am

Done, still only get a whitesrceen.
(besides a few errors in the frontend...)

Dimebag · Post by **Dimebag** » Wed May 27, 2015 7:44 am

Sorry i don't want to bother you...
But is anyone having an idea what i can do?

ionut · Post by **ionut** » Wed May 27, 2015 8:20 am

The page is loading correctly, but looking at the source code you have

Code: Select all

  <style type="text/css">
html { display:none }
  </style>

This makes your all your html code not visible. Did you made any recent change to your template or install any plugin that might generate this code?

Dimebag · Post by **Dimebag** » Wed May 27, 2015 8:32 am

I recently made an update of my modules.
Nothing changed to template or Plugins.
Can i simply change the code via FTP?

ionut · Post by **ionut** » Wed May 27, 2015 8:37 am

You could look into the administrator template and see if this code is present /administrator/templates/isis/index.php

Dimebag · Post by **Dimebag** » Wed May 27, 2015 9:37 am

The

Code: Select all

display:none

is not present in the index.php of the administrator tmpl.

sovainfo · Post by **sovainfo** » Wed May 27, 2015 11:03 am

That code means you have a javascript problem. While loading the document that code is there. Once properly loaded the displlay: none will be removed. Not removing it means there is a problem with other javascript code that gets executed.

Verify with diagnostic tools the loading of the document. It should show javascript errors.

Dimebag · Post by **Dimebag** » Wed May 27, 2015 11:12 am

I dont know anything about javascript...
I thought there would be a little code snippet or file that must be renamed or changed.

Can you help me with what i need to do?

sovainfo · Post by **sovainfo** » Wed May 27, 2015 11:34 am

Normally I would advice to restore from backup and start updating till you get the problem.

If you try url: administrator/index.php?option=com_plugins
You might be able to see which system plugins are running, maybe one of them is causing this. Disable it.
When it is a module causing this trouble try com_modules. Filter on the administrator modules and unpublish those looking suspicious.

EDIT:
Note that you can just remove the display: none from the Diagnostic tool (firebug). It allows you to continue, till the next time the error occurs, of course. Repeat it as many times as needed to figure out what is causing it.

ionut · Post by **ionut** » Wed May 27, 2015 11:56 am

Check the presence of this file on your server: /plugins/system/joomfever/joomfever.php
It looks like this is the cause of your error.
Open the file and after

Code: Select all

public function onAfterInitialise(){

add

Code: Select all

return;

Save and see if it works.

sovainfo · Post by **sovainfo** » Wed May 27, 2015 11:59 am

Suggest to disable the plugin instead of changing code.

Dimebag · Post by **Dimebag** » Wed May 27, 2015 8:12 pm

Got it!

I added the "Return;" phrase in the joomfever code, now i can enter the backend again.

Very many thanks to all of you guys!

I hope i can figure out what exactly causes the issue, so it will never happen again...

Thank you very much!

ionut · Post by **ionut** » Thu May 28, 2015 5:19 am

And now you can disable this plugin to avoid future issues.

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Cant enter Backend --> Whitescreen

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