(And How You Can Avoid Them Like a Pro)

If you’ve ever tried installing PrestaShop, you already know—it’s not always fireworks in a good way.

At HiddenTechies, we’ve worked on countless PrestaShop projects. While the platform is robust and flexible, the installation phase has given us more than a few “firecracker” moments—unexpected errors, silent freezes, mysterious permission issues, and much more.

In this blog, we’re sharing 7+ real-world installation headaches we’ve faced—and more importantly, how you can avoid them when setting up your PrestaShop store.

Whether you’re a developer, merchant, or agency, this article will walk you through PrestaShop installation problems, fixes, and tips based on actual hands-on experience.

1. Is Your Hosting Even Ready for PrestaShop?

Let’s start with the basics. Not every hosting environment is PrestaShop-friendly, even if the host says it supports PHP and MySQL.

Many times, the issues we faced weren’t with PrestaShop itself, but with underpowered or misconfigured servers.

Minimum Server Requirements for PrestaShop (as of 2025):

  • PHP 7.4 or 8.x
  • MySQL 5.6+ or MariaDB
  • Apache 2.4+ or NGINX
  • 64MB+ memory limit (preferably 128MB or higher)
  • Enabled extensions: PDO, cURL, GD, OpenSSL, Zip, Mbstring, DOM

💥 We once faced a 500 Internal Server Error, only to discover that PHP’s intl extension was missing!

💡 TIP:

Before you upload PrestaShop, run a server compatibility check using PrestaShop’s system requirements script or consult your host. Shared hosting often lacks necessary flexibility.

2. Why Did the Installation Page Just Freeze?

Everything was uploaded, we hit the /install URL… and then it froze. No error message. No logs. Just a blank stare.

This is one of the most common PrestaShop installation issues—and one of the most frustrating. The causes? Often a mix of:

  • Incorrect file permissions
  • Server timeout
  • Incomplete upload (especially via FTP)
  • Memory limit exhaustion

In one case, an unzipped file got corrupted, and it took us hours to realise that only half of /classes/ made it to the server.

💡 TIP:
 Always upload PrestaShop using SFTP or SSH, and double-check the file count against the original ZIP before beginning installation.

3. Did We Choose the Right PrestaShop Version?

Yes, versioning matters. Installing the latest version isn’t always the best idea, especially if you’re planning to use older add-ons or themes.

We’ve learned (the hard way) that theme and module compatibility often lags behind major releases.

Related Read:  How to add Promotion Bar in PrestaShop Store?

For example:

  • PrestaShop 1.7 modules may not work on 8.x
  • A premium theme we purchased hadn’t been updated for PHP 8, causing critical errors post-install

💡 TIP:

Always check the compatibility of your themes and modules with the PrestaShop version you’re installing. If you’re starting fresh, prefer a stable minor version, not just the latest.

4. What Permissions & File Settings Broke Everything?

PrestaShop needs specific file and folder permissions to install correctly. If these aren’t set properly, you’ll see install errors—or worse, security vulnerabilities later.

We once spent an entire afternoon debugging a blank module list page, only to discover that the /modules folder had 777 permissions and was being blocked by the host’s firewall.

Recommended Permissions:

  • Files: 644
  • Folders: 755
  • Never use 777 unless testing locally—and never leave it that way

Also, double-check .htaccess and robots.txt files—some FTP tools don’t upload them correctly.

💡 TIP:
 After installation, delete the /install folder and set sensitive files like /config/settings.inc.php to 444.

5. Why Didn’t the Database Connect (Even With Correct Credentials)?

This one drove us crazy.

Even after triple-checking the DB name, user, and password, PrestaShop kept throwing a database connection error during install. We ruled out typos. We checked MySQL logs. What was the issue?

Turns out:

  • The database user didn’t have GRANT privileges
  • The database host needed to be 127.0.0.1 instead of localhost
  • Or, MySQL’s sql_mode was too strict (common with MariaDB setups)

💡 TIP:
 Run this command in MySQL before installing (if you have access):

SET GLOBAL sql_mode = ”;

And avoid using symbols like @ in your DB password during install—it confuses URL parsing in the script.

6. How Did Add-ons & Themes Clash Right After Install?

So you’ve installed PrestaShop. Great! Now it’s time to add some flair with themes and modules… and then, boom—500 errors, broken product pages, or the back office crashing.

Most of the time, this happens because:

  • The theme is not compatible with your PrestaShop version
  • The module conflicts with core files or overrides classes
  • You activated two modules, trying to hook the same space without priority

We once installed a shipping add-on that disabled the entire checkout process because it overrode the carrier controller improperly.

Related Read:  Top Free PrestaShop 1.7.6 Themes for 2020 (Download Now)

💡 TIP:
 Always install add-ons and themes one at a time, test them, and take a backup after each successful install.

7. Is the SSL/HTTPS Setup a Dealbreaker?

In today’s world, HTTPS isn’t optional. But enabling it improperly in PrestaShop can break your login sessions, cause redirect loops, or block backend access.

What went wrong for us?

  • Enabling SSL in the PrestaShop back office before installing an SSL certificate
  • Redirect loops caused by .htaccess rules and PrestaShop’s URL rewriting
  • Session cookies are not saved due to mixed content

💡 TIP:
 Always install your SSL certificate first via the hosting panel, then enable HTTPS in PrestaShop’s back office under “Shop Parameters > General”.

Use Chrome DevTools to spot mixed content errors.

BONUS: What Did We Learn About Error Logging (the Hard Way)?

PrestaShop is powerful, but its error messages can be cryptic (or hidden). When something breaks, the screen might just go white, with no obvious error.

After several frustrating installs, we now always:

  • Enable debug mode immediately post-install
  • Check /var/logs/ for actual error logs
  • Inspect Apache or nginx error logs at the server level
  • Turn on PHP’s display_errors in the hosting panel (for development only)

💡 TIP:

To enable debug mode manually, edit /config/defines.inc.php and set:

define(‘_PS_MODE_DEV_’, true);

Final Thoughts – Install with Confidence, Not Chaos

Installing PrestaShop can be a smooth ride—or a minefield—depending on how prepared you are. As we’ve seen, it’s often the small details that create the biggest roadblocks.

At HiddenTechies, we’ve helped countless clients launch fully optimised, stable PrestaShop stores. Whether you’re setting up your first store or migrating from another platform, our team ensures your installation is smooth, secure, and scalable.

 

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