Product Settings fails with Symfony error

[withypitts]

8.0.4

PARAMETERS  -->  Shop Parameters  --> Product Settings

RESULTS IN:

Attempted to call function "highlight_file" from namespace "Symfony\Component\ErrorHandler\ErrorRenderer".

No errors reported.  Hosting service can find no issues.  Prestashop support say not a ore issue.

I'm struggling to see where the problem is.

I've cleared caches.

All other menu items in PARAMETERS & Shop Parameters work fine.

 

[alex_developer]

It's hard to say.
Perhaps you are using a version of PHP that is not compatible with the current version of Prestashop.
I recommend using PHP xDebug if you have full access to the server. It will show you exactly where the problem is

Edited yesterday at 09:26 AM by Oleksandr (see edit history)

[El Patron]

8.0.4 is the 4th patch of beta 8.0.

it is not a very reliable version, really until 8.2.3 was ps8 really ready

you should consider an upgrade, but back everything up, build staging on subdomain, upgrade there to test. etc.  Do not at this time upgrade to ps9, it's not anymore ready that 8.0.4 was.

 

[withypitts]

Thank you, we are planning to upgrade but are aware that this is not necessarily easy.

Update: We’ve reviewed the PHP error logs and found that the issue is related to the Smarty template engine used by your PrestaShop website. The error message:

indicates that part of the template system is trying to access a property that doesn’t exist. This typically occurs due to a compatibility issue between the Smarty and Symfony libraries, or when the site is running on a newer PHP version that these components were not fully designed for.

 

[El Patron]

3 hours ago, withypitts said:

Thank you, we are planning to upgrade but are aware that this is not necessarily easy.

Update: We’ve reviewed the PHP error logs and found that the issue is related to the Smarty template engine used by your PrestaShop website. The error message:

indicates that part of the template system is trying to access a property that doesn’t exist. This typically occurs due to a compatibility issue between the Smarty and Symfony libraries, or when the site is running on a newer PHP version that these components were not fully designed for.

 

rather than preach and perfectly understand, admin should not upgrade unless they talk to ps adult jajajaja

let's try this wild guess, and here we go!

The error “Attempted to call function highlight_file …” is only because the host disabled that PHP function. Re-enable it and reload — you will then see the real Symfony error. The real error is:
“Expected argument of type object, array or empty, string given”
which usually means a module added something wrong to Shop → Parameters → Product Settings. Disable the extra module(s) that extend that page, reload, and it should open. Then re-enable one by one to find the culprit.

To find the real cause
On 8.0.4 the Product Settings page is a Symfony form that other modules can extend. The classic causes:

• A module that tries to add a field and returns string instead of array in its form subscriber.
• A module that stored invalid JSON/array in configuration and now the form can’t hydrate it.
• A value in ps_configuration that should be array but is now string.

Quick checks:

Temporarily disable 3rd-party/back-office form modules (stock, feeds, product extras) and try the page again.

Turn on debug and check /var/logs or var/logs/dev.log once highlight_file is enabled — it will tell you exactly which field is failing.

If you recently installed/updated a module just before this started, that’s suspect #1.

 

If you can grab the first stack trace after enabling highlight_file, paste it and I can tell you exactly which module/field it is.

[withypitts]

Thank you for the detailed explanation, great help.  We have disabled 3rd party modules and issue goes away.  We will research the cause based on you help, many thanks, 

Regards

Richard