Prestashop Fatal Error: how to do it and who is the best ?

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Fatal Error Prestashop 1.7: cache in appDevDebugProjectContainer.php.

If you receive a 500 error (blank page) in your back-office, activate Prestashop errors (in the advanced settings->performance menu). You can only enable debug mode for your IP address. This error can occur when you update Prestashop. This error is caused by the site cache. You can force compilation, flush cache multiple times, etc. But it will not help error 500. If you have Prestashop 1.7 1.1, connect to your server. Delete the prod folder in app/cache/prod. To get the most recent versions, delete the dev and prod folders in var/cache.
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You should watch out for occurrence of Fatal Error Prestashop.

Your site changes as you add modules, files, modify content or configuration. These are just a few of the many ways you can manipulate your site. Sometimes you may not even know it or not be able to detect it. To ensure the success of your store, it is important to keep an eye on your performance and to be able to react quickly if necessary. An error on one or more pages of your site can lead to huge losses, especially if it is not obvious. Prestashop modules allow you to monitor the site every day in search of any errors. Once you have installed it, you can activate notifications and alerts in the module to receive warnings by e-mail: site inaccessible; slowdown in speed or occurrence of Fatal Error.
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When I try to connect, I get the error message: "Fatal error -> Uncaught -> Smarty: Unable to write file".

Prestashop cannot write to Smarty cache files. Here are some suggestions: Go to your FTP and delete everything in the "cache/smarty/compile" folder. Go to your FTP and look at the access rights to the "cache/smarty/compile" folder if they are not set to 755. Navigate to your site's database and locate the "ps_configuration" table. Set the variable "PS_SMARTY_CACHE" to 0 and "PS_SMARTY_FORCE_COMPILE" to 1. This will solve your problem. However, your site will be slow so you will need to do some further research. Your host may have exceeded the disk space limit. Contact him to confirm. Some hosts, like 1&1, limit the number of files stored on their server, even if there is enough disk space. If so, you can change host.
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Fatal Error: Class 'PrestaShopAutoload' not found in /config/autoload.php.

This error is often caused by Prestashop updates or downloads on the server. A file is missing, corrupted or truncated. Occasionally I get this error due to a download that we believe is complete but is actually corrupt. It's hard to see (and we can also think of file permission issues). The solution is simple: Download the version of Prestashop that corresponds to the one you are trying. Download the /classes, /controllers directories and upload them to your FTP server. Make sure you have a good connection. Send files slowly (not all at once, or ten by ten as FileZilla suggests). Upload your files so they are all there, complete and uncorrupted. You may need to verify file permissions. However, they should not be moved. If you are unsure if a download is cut, plan two passes.
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Fatal Error Prestashop: Class "Tools" not found.

Prestashop 1.6 can also encounter this problem, but the solution is almost the same. Under Prestashop 1.6, return the files from the /classes directory by FTP, delete the cache/class_index.php file, and empty your cache. Prestashop 1.7 also allows you to return the contents of the /classes directory from a healthy database which has been downloaded from the Prestashop site. Next, delete everything in the /var/cache directory. Next, delete the store admin cache directory.
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Fatal Error allowed memory size on CategoryDataProvider.

Edit the /httpdocs/src/Adapter/Category/CategoryDataProvider.php file change the getBreadCrumb method We will deactivate the breadcrumb category in the back office. Other fatal errors are sometimes made here is the error when I click on module and service "[PrestaShop] Fatal error in module file/classes/module/Module.php(1361): eval()'d code: syntax error, unexpected 'use' (T_USE)" Fatal Error: Uncaught Error
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Fatal Error Ebay Prestashop module.

We had problems with the Ebay module of Prestashop, which allows you to export products to Ebay. After the activity of the Ebay module, the problem appeared. When trying to configure it, the customer received a blank page with this error message: PrestaShop] Fatal error inmodule jsmin: Uncaught exception 'JSMin_UnterminatedStringException' with message 'JSMin: Unterminated String at byte 227: ');' The problem remained despite an update of the Ebay module. We did some research on the error message and found that the "Fatal Error", which is a French translation error, was relatively easy to fix.
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What is a Fatal Error ?

A Fatal Error is an error that causes a computer program or the entire operating system of a computer to crash. This error is most commonly associated with Windows Blue Screen of Death. However, less severe fatal exception errors only cause a single program to exit. Sometimes fatal errors are temporary and spontaneous. In these cases, you can use your computer safely and without further problems. If the fatal errors persist or repeat themselves, especially when you use the same program or perform the same task repeatedly, there may be a problem with the software or hardware of the computer.
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What is PrestaShop ?

Are you interested in launching an e-commerce site? You may have heard of PrestaShop. PrestaShop is easy to learn. PrestaShop, developed in France, allows you to create online stores using an open-source solution. PrestaShop is an e-commerce CMS (Content Management System). It allows you to manage the content of your e-commerce site. As you already know, this solution will allow you to easily manage your store.
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How to fix a bug or problem on a module from which you got Fatal Error Prestashop ?

If you have purchased a module for Prestashop and you encounter a technical problem with Fatal Error, 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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