I fix Prestashop Stripe cache error message "Undefined index"

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What is this Prestashop Stripe cache "Undefined index" error?

I needed to update my website to Prestashop 1.7. The update went well with the module pre-installed to achieve this. The model has also been changed. However, I've been having issues with stripe since it was installed, in the back office I get this message which keeps popping up and I'm not sure what to do despite my studying on Google : Note on line 339 of file /var/cache/dev/smarty/compile/.file.configuration.tpl.php[8] Undefined index: display_in_back_office this completely stops my sales.
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What is the solution to the Prestashop Stripe cache "Undefined index" error?

If you have installed a Stripe module for Prestashop and you encounter a technical problem, Web2007 can assist you and troubleshoot. You should know that in almost all cases, the module works perfectly, the server or php error comes from a conflict with your theme or one of your other installed modules. A troubleshooting expert will first detect errors with Prestashop's debug mode. Here are the tips: To determine if the bug is due to your template, activate the default Prestashop template and then refresh the page. If the bug persists, it means that your model is not at fault. To determine if the bug is caused by one of your modules, disable each module and refresh the page that caused the problem. If the bug appears suddenly, you can start with the modules that were installed most recently. If the bug goes away when you disable a module, that means that module is responsible.
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