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Blank screen thrown in backend

  • Manos Krokos
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10 years 8 months ago #130720 by Manos Krokos
Blank screen thrown in backend was created by Manos Krokos
Hello, my K2 based website started throwing blank screen whenever I try to save my K2 parameters or create a new K2 User module. There might be other instances that this is happening but I have not seen them.
Saving a K2 item works like a charm.

I have enabled maximum error reporting but the resulting blank page is completely void of any content... visible or not. And no source code whatsoever.

Anyone with any ideas on the matter?

Manos K

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  • Krikor Boghossian
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10 years 8 months ago #130721 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
Sadly I am in the dark as well.
Have you tried development error reporting?
Are there any fatal error recorded on your error_log?

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10 years 8 months ago #130722 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
Hello Krikor and thanks for the reply.

I have tried everything when it comes to error reporting. Nothing is logged whatsoever.

The strangest thing: Now, the same thing happens with ALL modules (ie, pressing any button like Save, Cancel etc throws blank screen). Also the same thing started happening with the Global Confuguration as well. I can't seem to be able to save any changes there either.

I replaced the database with a previous day backup dump, and for a while Global configuration and the rest of the modules worked OK. The K2 User module (which was the one where I first noticed the issue) was still throwing blanks. After a while, the rest of the modules AND GC started throwing blanks again.

The only thing that I can think of is Suhosin but I disabled it from the account completely. It is still logging every now and then but it won't drop or block anything.

This is really bizarre and it's driving me nuts!

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10 years 8 months ago #130723 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
Here are some php notices from the error log... If you can make anything from them
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10 years 8 months ago #130724 by Kris Henneman
Replied by Kris Henneman on topic Re: Blank screen thrown in backend
This post probably won't help you, but below is a link to another thread that I started with a similar issue, but mine acts the same way on the frontend as well. I have yet to find an answer... If you read the thread, you'll see that I was able to get it working again by taking a backup of the data, uninstalling K2, then re-installing K2. Once I did that, it would save correctly, however all my articles were gone. However, when I re-imported the old data, then it broke again. So, it seems to me that something weird is going on with the data which is causing the issue.

K2 Blank Screen in Front End and Admin

Kris

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10 years 8 months ago #130725 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
These are warnings not actual errors.
They will not cause error or alter your site's functionality.

Is there a Fatal Error recorded?

Also since this is a global issue it is probably unrelated to K2.
Is your site experiencing heavy traffic? It could be mySql crashing and causing tables to lock. Have you tried repairing your DB tables?

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10 years 8 months ago #130726 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
hello Krikor,

Yes, they are warnings and they have nothing to do with the issue.

There are no Fatal Errors recorded whatsoever.

I understand that the issue might be unrelated to K2 but what puzzles me is that:

I do a fresh install from a backup. Everything works, Global Configuration is accepting changes etc.
I am making changes to other modules, not problem.
I am trying to make changes to K2 User module. Problem arises. And after that, Global Configuration and other modules are affected too. Like something is triggered by the K2 User module and gets corrupted for the rest of the installation.

I have tried to repair the database via Joomla's function and also tried Repair and Optimize tables by Admin Tools. No cigar! :(

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10 years 8 months ago #130727 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
If the problem lies with that module you should reinstall K2.
If you are using 3.3 then you should use the DEV version.
getk2.org/assets/get/

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10 years 8 months ago #130728 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
Yes, actually I am using 3.3.

I have tried reinstalling K2 as well as the whole Joomla but no luck. Is the DEV version suitable for a live site?

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10 years 8 months ago #130729 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
Sure, since you have already recents backups you can update with no fear.

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10 years 8 months ago #130730 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
Hello, according to your suggestion I installed the Dev version. As a matter of fact, I installed it on a fresh install of the template quickstart, copying all K2 items via phpmyadmin etc. So we are talking about a semi-fresh installation

Everything seems to be working Ok, except that at the backend, when I try to edit a K2 item or category, the title field is empty and impossible to edit. The title itself is there, it shows both on frontend and backend list view but when trying to edit item/category, it's disabled and looks empty.

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10 years 8 months ago #130731 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
I think you should as the template developer about this issue.
The most probable explanation is that a plugin that came bundled with the template is causing this.

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10 years 8 months ago #130732 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
It was working fine with the latest stable version of K2.

Also, saving any changes to the K2 parameters is still throwing a blank screen. All other configurations (Global or other components) save OK.

I am checking with the template developer and getting back to you on this.

Needless to say that K2 seems more buggy than ever. I have been using it for ages, almost since day one and I was also quite happy that it is a Greek origin product but its recent issues it makes me think twice about continuing to use it. Just saying...

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10 years 8 months ago #130733 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
FYI, I rolled back to 2.6.8 and now the title field is working as expected.

Parameters are still not saved.

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10 years 8 months ago #130734 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
If other extensions are not compatible with the latest version of K2, sadly we cannot do anything about this.

Keep in mind that template providers use frameworks which are compatible with only certain versions of K2.

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10 years 8 months ago #130735 by Manos Krokos
Replied by Manos Krokos on topic Re: Blank screen thrown in backend
But we are talking about the backend here and the Isis template which comes with Joomla. What does that have to do with the frontend template?

Also, like I said, rolling back to 2.6.8 fixed the issue.

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10 years 8 months ago #130736 by Krikor Boghossian
Replied by Krikor Boghossian on topic Re: Blank screen thrown in backend
The quickstart package contains other extensions as well.
If some of them are outdated, then issues will arise.

This goes for the front end and the backend as well.

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10 years 8 months ago #130737 by Rhesus Media Group
Replied by Rhesus Media Group on topic Re: Blank uneditable article title in backend!
I am no longer able to write anything into the title input box. It just shows blank with no cursor and seems uneditable. This happens with Joomla Isis backend template.

Please can you fix this asap?

See attached image for reference. Problem area highlighted in red.

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