[XYZ500]

Moved to a new VPS.
Everything else seems to be working fine. Whenever I try to post a new thread, it gives HTTP error 500 on Chrome. On Firefox, it just displays a blank (white) page.

On Chrome, the error is:
The website.com page isn't working
website.com is currently unable to handle this request.
HTTP ERROR 500

When I try to reply to a thread from 'Go Advanced' option. Same error. However, the 'quick reply' option is working.

The host says they cannot help with this (can't diagnose the problem) as this is not covered by the support. Until I can tell them what exactly is wrong in the VPS.

What is causing this? And how to fix this?

[Dave]

Take a look at the PHP or Apache/nginx error logs (somewhere in /var/logs on the server), that will tell you exactly why it's causing the 500 internal server error.

[XYZ500]

Originally Posted by Dave

Take a look at the PHP or Apache/nginx error logs (somewhere in /var/logs on the server), that will tell you exactly why it's causing the 500 internal server error.

Thank you. Can you tell me in a little bit more detail what exactly I should be looking for in the logs directory?

[DivisionByZero]

the reason text of the error.

[XYZ500]

Originally Posted by Dave

Take a look at the PHP or Apache/nginx error logs (somewhere in /var/logs on the server), that will tell you exactly why it's causing the 500 internal server error.

Found two error log files in /var/log/httpd.
No file that contains the word 'error' found in /var/log/

The two files found in /var/log/httpd are named "error_log" and "error_log-20161121". I downloaded them. Changed the extension to .txt so I could open them. They have the following text in them.

error_log file:

Block Disabled:      (Update License Status)
Suspended or Unlicensed Members Cannot View Code.

error_log-20161121 file:

Block Disabled:      (Update License Status)
Suspended or Unlicensed Members Cannot View Code.

I purchased the server on November 20th 2016 so any errors dated before that can be ignored I guess. After looking at these logs, can you tell me what exactly is wrong so I can tell my host to fix it?

P.S. I crossed out some IPs as this is a public forum.

[DivisionByZero]

ok so what's the timestamp closest to when you encountered the error?

[XYZ500]

Originally Posted by DivisionByZero

ok so what's the timestamp closest to when you encountered the error?

I am not sure what time zone the server is using. But I encountered this error 10 minutes before I created this thread. So you can say I encountered this error at 12:30 PM Melbourne time. I really can't tell you what the closest time of the server would be. But I think you can assume that the server is in CST time zone as the host operates in CST time zone as well.

[Dave]

Do you use some kind of control panel to manage your server? Maybe there's a PHP error log viewer somewhere.
The log files you pasted here don't really contain anything related to your error.

[XYZ500]

Originally Posted by Dave

Do you use some kind of control panel to manage your server? Maybe there's a PHP error log viewer somewhere.
The log files you pasted here don't really contain anything related to your error.

zPanel is used on the server.

I just created a new user account and tried creating a thread. This account is being able to create threads without any problem. But at the same time, the admin account is giving the error I mentioned. Seems like this error is exclusive to the admin account. Any ideas?

[Paul M]

Enable debug more and then try, see if any error is displayed.

[Lynne]

What version of vBulletin is installed? What version of PHP and MySQL are on the server? Do you have suhosin or mod_security enabled (you will probably need to ask your host this question)?

Also, if only the admin account is having the problem, try disabling your modifications/plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

Block Disabled:      (Update License Status)
Suspended or Unlicensed Members Cannot View Code.

[XYZ500]

Now its working. All of a sudden today its working. I didn't do anything, didn't make any changes. Isn't it weird?

[mrt_547]

I had this problem, every topic had this issue. I turned off the "Thumbs-up" add-on and the forum started working.