Fatal Error after instalation

[powerdrive]

After installing Backorder I get an error when I go to System -> Configuration

Fatal error: Class 'HusseyCoding_Backorder_Helper_Data' not found in /.../magento/app/Mage.php on line 547

Anybody have a solution?

I'm on CE 1.9.3.4

[Damian Culotta]

Hi @powerdrive,

It seems you've missed a file. I think the missed file is:

https://github.com/husseycoding/backorder/blob/master/app/code/community/HusseyCoding/Backorder/Help...

Take a look into your code to see if that file is present (if not, you can download it from GitHub)

[powerdrive]

Hi Damian, the file is there and I checked that the code matches.

[powerdrive]

I can clear the error by disabling the compiler, but it does introduce a security warning.

Important: Formkey validation on checkout disabled. This may expose security risks. We strongly recommend to Enable Form Key Validation On Checkout in Admin / Security Section, for protect your own checkout process.

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[Damian Culotta · Accepted solution]

Follow the link and enable the form key for checkout. That change was introduced in the last patch/version.