Cannot generate PDF Certifcate

[Arricdev]

Describe A clear and concise description of what the bug is.

After migrating to 1.11.28 When I try to download a certificate in PDF i Get an error 500

generating html certificate is OK

Was working in 1.11.26

To Reproduce Steps to reproduce the behavior:

1. Go to 'https://yourwebsite/certificates/index.php?id=XXX&user_id=XXX&action=export
2. See error

logs

Wed Nov 06 11:51:30.968799 2024] [proxy_fcgi:error] [pid 3934032] [client 127.0.0.1:52186] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught LogicException: To filter with a CSS selector, install the CssSelector component ("composer require symfony/css-selector"). Or use filterXpath instead. in path-to-chamilo/vendor/symfony/dom-crawler/Crawler.php:1296\nStack trace:\n#0 path-to-chamilo/vendor/symfony/dom-crawler/Crawler.php(791): Symfony\Component\DomCrawler\Crawler->createCssSelectorConverter()\n#1 path-to-chamilo/main/inc/lib/pdf.lib.php(345): Symfony\Component\DomCrawler\Crawler->filter()\n#2 path-to-chamilo/certificates/index.php(84): PDF->html_to_pdf()\n#3 {main}\n thrown in path-to-chamilo/vendor/symfony/dom-crawler/Crawler.php on line 1296', referer: https://yourwebsite/certificates/index.php?id=xxx&user_id=xxxxx&action=export

Expected behavior A clear and concise description of what you expected to happen.

PDF Download

[Kaneda-1]

Similar a https://github.com/chamilo/chamilo-lms/issues/3774 download the /vendor folder from the url https://github.com/chamilo/chamilo-lms/releases/download/v1.11.28/chamilo-1.11.28.zip and replaces the contents of the /vendor folder locally

The error you're seeing indicates that the CssSelector component from Symfony is missing, which is necessary for filtering with a CSS selector. Here's how to fix it:

Install the CssSelector component: Open a terminal in your project directory and run the following command to install the component rm composer.lock rm -rf web/ vendor/ composer clear-cache composer update

[Arricdev]

Thanks for your answer,

I already got the vendor/ dir when I migrated but the component seems to be missing.

Does that work if I install the component with composer on a QA server and then copy vendor/ dir ? This would generate less downtime

[Arricdev]

Ok, it worked , thank you. Maybe it would be great to update the release ?

[ywarnier]

Yes, we are working on a new release for within a few days.

[ywarnier]

Sorry for the long delay. Really working on closing all these issues now. I cannot reproduce the issue, so I'm assuming it was either some local configuration or the issue has already been fixed through some other bug report. Closing.

[Arricdev]

Hi, This issue is not resolved with 1.11.32 , css-selector is still not in the vendor folder of the release, need to do composer update to have it.

$ pwd /xxxxx/chamilo-1.11.32/vendor/symfony $ ls asset framework-bundle routing cache http-foundation security cache-contracts http-kernel security-acl class-loader intl security-bundle config options-resolver serializer console polyfill-ctype service-contracts debug polyfill-iconv stopwatch dependency-injection polyfill-intl-icu templating doctrine-bridge polyfill-intl-idn translation dom-crawler polyfill-intl-normalizer twig-bridge event-dispatcher polyfill-mbstring twig-bundle expression-language polyfill-php80 validator filesystem polyfill-util var-exporter finder process yaml form property-access

[ywarnier]

Re-opening on request by @Arricdev in #6424

[NicoDucou]

This issue was reported again on 20/10/2025 So to be revised for release 1.11.34