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PrestaShop 1.6 · 1.7 · 8.x: bug fixing

PrestaShop broken? We map it, then fix it.

Blank white page, a module that won’t install, an override conflict, a Smarty .tpl error, payment that won’t return, or a back office wrecked by a 1.7 → 8 upgrade. We trace the module & hook map, find the real cause, and fix it safely on your live shop.

  • Emergency triage for store-down white pages & 500s
  • Safe on live: backup first, staging where the host allows
  • Regression-tested across front & back office
Regression-tested fixes Stores in 8+ countries
  • < 4h Emergency response

    For a store-down PrestaShop emergency, a blank white page or a 500, we acknowledge and start triage fast, before we touch a single file.

  • 1.6 → 8 Versions covered

    PrestaShop 1.6, 1.7 and 8.x, including the gnarly 1.7 → 8 back-office migrations where overrides and themes break.

  • 100% Safe-on-live

    Debug mode read-only first, a full backup before any change, and a staging copy where the host allows it. We never edit a live shop blind.

  • Free Regression retest

    Every fix ships with a regression check, front office, back office and checkout, so the same module or override bug can’t silently return.

Quick answer

Typical timeline from your first message

  1. Report 0-4h
  2. Reproduce Triage
  3. Root-cause Diagnosis
  4. Fix + regression test Fix
The module & hook map

Where PrestaShop bugs actually hide

A PrestaShop request runs through controllers, registered hooks, module overrides and Smarty templates. We map that chain to find the exact point where it breaks.

Controller FrontController Routing & init
Hooks Hook::exec() Modules attach here
common fault Overrides override/ Two modules, one method = conflict
Smarty .tpl Template + compile cache
Rendered page 200 OK Front & back office

A white page means the chain dies before render: almost always at an override, a missing class, or a broken .tpl. We read var/logs to find the exact link.

Common PrestaShop bugs

Six PrestaShop bugs we fix every week

Real symptoms, real error strings, across PrestaShop 1.6, 1.7 and 8.x. On a different platform? We also do urgent WooCommerce and OpenCart bug fixing.

  • Blank white page (500) with nothing shown

    The classic PrestaShop white screen of death, front office or back office renders an empty page and the browser shows no error. The real cause is hiding in var/logs/ or a fatal swallowed by display_errors = Off. We enable debug mode safely, read the fatal, and fix the root cause, not just paper over it.

  • Module install & override conflict

    A module won’t install, or two modules both ship an override/ for the same class and fight over the same method, The method ... is already overridden. We map the override chain, resolve the conflict cleanly, and clear the stale override/cache so the right class loads.

  • Smarty template compile errors

    A .tpl throws Smarty: Syntax error in template or unknown tag after a theme edit or an upgrade. Often a deprecated {template} include, a missing {block}, or a stale compiled file in var/cache/prod/smarty/compile. We fix the template, clear the compile cache, and verify every affected page.

  • “Class X not found” after a module update

    A module update or a partial upload leaves Class 'AdminSomethingController' not found or a fatal autoload error. Usually a half-deployed module, a stale var/cache/prod/class_index.php, or a namespace mismatch. We rebuild the class index, regenerate the cache, and confirm the back office loads.

  • Payment module not redirecting / returning

    Customers hit pay and the gateway never redirects, or returns to a broken order-confirmation, Stripe, PayPal, Mollie or a bank module silently failing the validation hook. We trace the validateOrder() call, the IPN/webhook return, and SSL/base-URL mismatches so orders complete and confirm.

  • Multistore config & broken back office

    A multistore shop showing the wrong theme, wrong currency or the wrong URL per shop, or a back office that breaks after a 1.7 → 8 upgrade (white tabs, missing menu, dead AdminController). We fix the shop-context config, repair the override/theme breakage, and get admin usable again.

Store down right now? Start at the emergency e-commerce bug fixing hub for 24/7 incident response.

How it works

Five steps from report to verified fix

No black box. We diagnose read-only first, back up before any change, and verify front office, back office and checkout before we call it done.

  1. 01

    Report

    You send the symptom, the exact error string, the PrestaShop version (1.6 / 1.7 / 8.x), and what changed last, a module install, a theme edit, or an upgrade. We open a triage ticket.

    0-4h
  2. 02

    Reproduce

    We confirm the bug and read the logs, var/logs/, the Smarty compile errors, PHP-FPM and web-server logs, with debug mode enabled safely. No guessing at the cause.

    Triage
  3. 03

    Root-cause

    We map the module & hook chain to isolate the real cause: an override conflict, a Smarty template fault, a config drift, or a half-deployed module. You get a plain-English explanation.

    Diagnosis
  4. 04

    Fix + regression test

    We apply the fix on a staging copy (or safely on live with a backup), clear the right caches (var/cache, override/cache, Smarty compile), then run a regression check.

    Fix
  5. 05

    Deploy + verify

    We deploy, verify front office, back office and checkout end-to-end, confirm hooks fire and orders complete, and send a short written summary of what broke and why.

    Verified

Your quote

Get a fixed quote for your project

Tell me what you need on WhatsApp. I reply the same day, 10 AM to 7 PM IST, Monday to Saturday, with a written scope, price and timeline.

  • Free first call
  • Written scope, price and timeline
  • You approve every change
What clients say

Stores we’ve already rescued

Five-star average across Upwork, Clutch and direct referrals. Real shops, real fixes.

5.0 from 100+ reviews on Upwork

  • Illustration of Magento 2 development work for a sports footwear and hockey shop
    Sports footwear and hockey shop, Netherlands
  • Illustration of Magento 2 development work for a photo printing supplies wholesaler
    Photo printing supplies wholesaler, Netherlands
  • Illustration of Magento 2 development work for an educational toys and books shop
    Educational toys and books shop
  • Kishan has done an excellent job in a timely manner. He is very knowledgeable, has a very positive attitude, easy to communicate.

    Z. K.Magento 2 client
  • He is technically strong, approaches problems thoughtfully, and focuses on stable, long-term solutions.

    E. H.Magento 2 client
  • Kishan was a pleasure to work with! He is highly skilled, professional, and delivered outstanding results on time.

    M.Magento 2 client
  • PrestaShop bugs fixed for stores in
  • United States
  • United Kingdom
  • Canada
  • Australia
  • Germany
  • France
  • Netherlands
  • India
Read all reviews
FAQ

PrestaShop bug-fixing questions, answered

How much does it cost to fix a PrestaShop bug?

Pricing is a fixed written quote for your scope. Send the details on WhatsApp and I reply within one working day.

It depends on scope, but the entry point is a Quick Fix for one well-defined bug with a known error string, one white page, one failing module, one Smarty error. A Bug-Fix Sprint (about 20 hours) covers a batch of bugs or one gnarly root-cause issue such as an override war or post-upgrade back-office breakage. High-revenue shops can take an Emergency Retainer for 24/7 on-call cover. Every quote is fixed-price, no hourly surprises.

How fast can you fix a PrestaShop store that’s down?

A store-down emergency, a blank white page or a 500, can usually be triaged within minutes and resolved the same day. We target a first response under 4 hours during cover hours (faster on a retainer). The quickest path to a fix is to send the exact error string from var/logs/ and tell us what changed last: a module install, a theme edit, or a 1.7 → 8 upgrade.

My PrestaShop shows a blank white page, how do you fix it?

The PrestaShop white screen of death means a fatal PHP error is being swallowed because display_errors is off. We enable debug mode safely (set _PS_MODE_DEV_ or use the back-office advanced parameters), read the real fatal from var/logs/, and fix the root cause, a bad override, a missing class, a memory limit, or a corrupt var/cache. Then we turn debug mode back off and clear the cache so the live shop renders clean.

Can you fix a module install or override conflict?

Yes, this is one of the most common PrestaShop bugs we see. When two modules both ship an override/ for the same class, you get The method ... is already overridden and one module silently loses. We map the full override chain, resolve the conflict (merge the overrides or move logic into a hook), delete the stale override/cache and var/cache/prod/class_index.php, and confirm both modules work together again.

Can you fix a Smarty template (.tpl) compile error?

Yes. Smarty: Syntax error in template or unknown tag usually comes from a deprecated {template} include, a missing {block}, or a stale compiled file in var/cache/prod/smarty/compile. We fix the offending .tpl, clear the Smarty compile cache, and verify every page that uses the template, product, category, checkout and CMS, renders correctly.

I get “Class not found” after a module update, can you fix that?

Yes. Class 'AdminSomethingController' not found after a module update is almost always a half-deployed module, a stale class index, or a namespace mismatch. We finish or roll back the deploy, rebuild var/cache/prod/class_index.php, regenerate the cache, and confirm the back office and the module’s controllers load. If the module itself is broken, we patch it or pin a known-good version.

My payment module doesn’t redirect or return, can you fix it?

Yes. When Stripe, PayPal, Mollie or a bank module never redirects, or returns to a broken order-confirmation, the cause is usually a failing validateOrder() call, a missing IPN/webhook return URL, or an SSL / base-URL mismatch between the gateway config and the shop. We trace the full payment hook flow, fix the return handling, and place real test orders so confirmations and order status update correctly.

Can you fix a broken back office after a PrestaShop 1.7 → 8 upgrade?

Yes, this is a frequent request. After a 1.7 → 8 upgrade the back office can show white tabs, a missing menu, or dead AdminControllers because old overrides, a legacy theme, or incompatible modules didn’t survive the jump. We audit the upgrade, repair or remove the breaking overrides, update incompatible modules, clear the caches, and get admin fully usable again, ideally on a staging copy first.

Can you fix a PrestaShop multistore configuration bug?

Yes. Multistore bugs, the wrong theme, currency, language or URL showing for a given shop, usually come from a shop-context config saved at the wrong level (global vs group vs shop) or a module that ignores the shop context. We fix the per-shop configuration, check the URL/SSL domain mapping, and verify each storefront and its checkout render with the right settings.

Can you fix it without breaking my live shop?

Yes, that’s the whole point of how we work. We diagnose in debug mode read-only first, take a full backup of files and the database before any change, and work on a staging copy wherever your host allows it. When a fix must go on live, we have a rollback ready. We never edit a live PrestaShop shop blind, and every change is verified before we call it done.

Do you work on staging or on the live shop?

Staging first whenever it’s available, it’s the safest way to reproduce and fix a bug. If you don’t have a staging environment, we can clone one quickly, or, for a true emergency, work carefully on live with a backup and a rollback plan. Either way you keep selling: we schedule any risky step around your traffic and confirm the storefront stays up.

Is there a guarantee the bug stays fixed?

Yes. Every fix ships with a regression check across front office, back office and checkout, so the same module or override bug can’t silently come back. If our fix breaks something else, we fix that too at no extra charge. You also get a short written summary of what broke and why, plus a recommendation to stop it recurring, for example, moving override logic into a proper hook.

Got a PrestaShop bug? Let’s map it.

Send the symptom and the error string. We’ll triage the module & hook chain, find the real cause, and fix it safely on your live shop.

Report your PrestaShop bug

Takes 2 minutes. Send the symptom, the error string and your PrestaShop version, we reply with a triage plan and a fixed-price quote, emergencies first.

Message me on WhatsApp

No form to fill. Send me a quick message. I reply during 10 AM to 7 PM IST, Monday to Saturday.

Helpful to mention

  • PrestaShop version
  • Store URL
  • How urgent is it
  • Access you can give
  • Affected area
  • What changed last

These are already in the message for you. Just add your answers.

Message me on WhatsApp

Or save my number: +91 84012 70422

Store broken? First look within the hour Report your bug