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viewinvoices.php and invoices.php are not opening


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I have upgraded my whmcs to 7.5. After upgrade the viewinvoices.php in client area and invoices.php in admin are throwing error like "Oops!Something went wrong and we couldn't process your request.".

I have checked the logs and it is giving error like "[12-Apr-2018 15:46:56] PHP Fatal error: Call to protected method WHMCS\Invoice::loadData() from context '' in /public_html/client/viewinvoice.php on line 0".

Also the same error is coming after client submitting a ticket.

Is anyone else facing the same issue or i am the only one. Kindly, help me out with this.5acfc6ca176d1_ScreenshotatApr1302-02-16.thumb.png.b7befb97d1bb14cca7689bc4882f6dd9.png5acfc6da1ae3a_ScreenshotatApr1302-02-54.png.b037c7815368e8f6b903583ee4b0e9b1.png

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  • WHMCS Support Manager

Hi @Ahzam,

This error is caused by customisations to your templates. Please switch to the stock Six template as an immediate workaround.

You can then take a closer look at your custom template files and make sure the relevant updates have been applied: https://docs.whmcs.com/Version_7.5.0_Release_Notes#Template_Changes

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I have not applied any custom templates or any. I am just using the default template six from beginning. And i have automatic update from the whmcs admin panel. 

Can you please tell the steps on how to switch the template with the previous one if needed.


Thanks in advance

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