After log-in, index.php loads blank page

[ConduciveMammal]

I upgraded my WHMCS to the latest version last week, and just today and yesterday, after I pass the login page for the admin section of WHMCS, it loads index.php but shows only a blank page.

 

This happened on the two times a new customer signed up, but I think it's due to inproper SSL settings, I tried changing the URLS inside the admin panel to SSL's https and it's loading that by default now but showing just a blank page.

 

The guys at tech support recommended I copy new files into the directory to "restart" WHMCS, but I don't want to lose all my settings.

 

Also, I now get a PHP error:

Fatal error: Cannot redeclare gracefulcorerequiredfileinclude() in /home/allrou5/public_html/init.php on line 20

Edited September 4, 2014 by ConduciveMammal
Added details

[massa]

does someone have solution for this problem?

[brian!]

reuploading is probably the best solution - nearly all the settings are stored in the database (apart from configuration.php and any changes you've made to the php and template files).

 

so, take a backup of your current site, and then reupload the latest version.

[mbit]

Do you have some file, a hook maybe, calling (include) for the init.php fle?

[arundatatech]

public_html/ /init.php on line 20 whmcs

 

Fatal error: Cannot redeclare gracefulcorerequiredfileinclude() in /home/warrij6o/public_html/billing/init.php on line 20

 

all that did was upload reseller club mods files

 

i think it is calling for init.php

 

i am not sure

[mbit]

Yep. Some script is loading the init.php or some other file that calls for the init.php file

[arundatatech]

Re: WHMCS v.5.2.12 upgrade and problem with editing admin roles page

Found the problem - I had put the resellerclub mods widget in the admin folder not the WHMCS root

 

 

http://forum.whmcs.com/showthread.php?80706-WHMCS-v-5-2-12-upgrade-and-Fatal-PHP-error&p=344782#post344782

[arundatatech]

now another issue

 

 

Notice: Undefined index: transid in /home/megassgn/public_html/clients/modules/addons/paypal_addon/hooks.php on line 0

[WHMCS John]

H,i

That's just a notice and not an error. Please disable display_errors and lower error_reporting.

[screenbeard]

now another issue

 

 

Notice: Undefined index: transid in /home/megassgn/public_html/clients/modules/addons/paypal_addon/hooks.php on line 0

 

I had this exact same problem, and it was because of an admin theme I had installed. I had to log into my database and edit the adminusers table, find my user details and under theme, alter it to one of the default themes, like 'blend', then everything started working again.