[PrestaShop] Fatal error in module index:

[scandbev]

Hi,

 

We are trying to configure the module Advanced Pack 5 in our 1.5.3.1 version of Prestashop. The problem we are facing is that we get an error message saying: You can't have a different warehouse into pack, please choose another product in order to continue. 

 

After being in contact with the modules support staff they answered the following:

"There a PHP error on your back office, related to APC caching system :

[PrestaShop] Fatal error in module index:
Use of undefined
constant apc_delete_file - assumed 'apc_delete_file'

This error avoid a product to be added to a pack, and must be fixed first."

 

My problem is that I do not know where to start the troubleshooting and when googeling it I get 0 hits. Does anyone here know or have any ideas of the source of this error message and where to start the troubleshooting or even better how to resolve it?

 

Thanks in advance for any help

 

Regards

Peter