Hi there,

Thanks for contacting us. Sorry for the inconvenience. Please enable the debug mode(debug=1) from configuration.php file and let me know.

-Thanks

Thank you for the reply. This is what I found after turning debug on:

Symfony\Component\ErrorHandler\Error\ ClassNotFoundError in /home/purrfect/public_html/templates/shaper_helixultimate/error.php (line 19)

use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;
$app = Factory::getApplication();
$doc = Factory::getDocument();
$template = HelixUltimate\Framework\Platform\Helper::loadTemplateData();
$params = $template->params;
$theme_url = Uri::base(true) . '/templates/'. $this->template;
/** If SP Page Builder page as a error page is activated- */

require() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 779) HtmlDocument->_loadTemplate() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 838) HtmlDocument->_fetchTemplate() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 641) HtmlDocument->parse() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 660) HtmlDocument->render() in /home/purrfect/public_html/libraries/src/Document/ErrorDocument.php (line 140) ErrorDocument->render() in /home/purrfect/public_html/libraries/src/Error/Renderer/HtmlRenderer.php (line 77) HtmlRenderer->render() in /home/purrfect/public_html/libraries/src/Exception/ExceptionHandler.php (line 131) ExceptionHandler::render() in /home/purrfect/public_html/libraries/src/Exception/ExceptionHandler.php (line 74) ExceptionHandler::handleException() in /home/purrfect/public_html/libraries/src/Application/CMSApplication.php (line 311) CMSApplication->execute() in /home/purrfect/public_html/includes/app.php (line 63) require_once('/home/purrfect/public_html/includes/app.php') in /home/purrfect/public_html/index.php (line 32) Error

Class "Joomla\Plugin\Behaviour\Taggable\Extension\Taggable" not found

This was in the header as well.

Attempted to load class "Helper" from namespace "HelixUltimate\Framework\Platform". Did you forget a "use" statement for another namespace?

Symfony\Component\ErrorHandler\Error\ ClassNotFoundError was in the Header

Provide me a backup of your site. I will check it on my localhost & I will give you an feedback as soon as possible. Thanks

Hello Chuck,

this looks really bad.
Even the backend is affected.

https://purrfectcompanions.org/administrator/

An error has occurred.
0 Class "Joomla\Plugin\Behaviour\Taggable\Extension\Taggable" not found

You unfortunately seem to be one of the affected users who retained a destroyed instance when updating Joomla to 4.2.

https://github.com/joomla/joomla-cms/issues/38474#issuecomment-1219742514

brianteeman commented 15 days ago delete the file administrator/cache/autoload_psr4.php problem solved

Please try this once.

Jens, I did delete file and now the it shows this error. Also I just recieved a notice from hosting saying they lost all of my server backups from hardware failure. I am sending the backup to Toufiq

Error ClassNotFoundError HTTP 500 Whoops, looks like something went wrong. Attempted to load class "Helper" from namespace "HelixUltimate\Framework\Platform". Did you forget a "use" statement for another namespace?

Exceptions 2 Stack Traces 2 

Symfony\Component\ErrorHandler\Error\ ClassNotFoundError in /home/purrfect/public_html/templates/shaper_helixultimate/error.php (line 19)

use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;
$app = Factory::getApplication();
$doc = Factory::getDocument();
$template = HelixUltimate\Framework\Platform\Helper::loadTemplateData();
$params = $template->params;
$theme_url = Uri::base(true) . '/templates/'. $this->template;
/** If SP Page Builder page as a error page is activated- */

require() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 779) HtmlDocument->_loadTemplate() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 838) HtmlDocument->_fetchTemplate() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 641) HtmlDocument->parse() in /home/purrfect/public_html/libraries/src/Document/HtmlDocument.php (line 660) HtmlDocument->render() in /home/purrfect/public_html/libraries/src/Document/ErrorDocument.php (line 140) ErrorDocument->render() in /home/purrfect/public_html/libraries/src/Error/Renderer/HtmlRenderer.php (line 77) HtmlRenderer->render() in /home/purrfect/public_html/libraries/src/Exception/ExceptionHandler.php (line 131) ExceptionHandler::render() in /home/purrfect/public_html/libraries/src/Exception/ExceptionHandler.php (line 74) ExceptionHandler::handleException() in /home/purrfect/public_html/libraries/src/Application/CMSApplication.php (line 311) CMSApplication->execute() in /home/purrfect/public_html/includes/app.php (line 63) require_once('/home/purrfect/public_html/includes/app.php') in /home/purrfect/public_html/index.php (line 32) Error

Class "Joomla\Plugin\Behaviour\Taggable\Extension\Taggable" not found

Toufiq, here is the link to the backup files. I SO appreciate it.https://drive.google.com/file/d/1YE5Si8VLLwEaPsra2-UqLaY9fT8dwHYp/view?usp=sharing

Some of plugins needs to rename. Maybe they aren't up to date with Joomla 4 or you didn't update.

https://prnt.sc/_GZBnI0xn1Wf

https://prnt.sc/p6bw8Mi4l398

I went to my cpanel and do not see any of those files. Not sure if you or Jens may have removed them. Very odd. In plugins>content: the last folder is "vote". Nothing from route 66 I will check the DB for any tables left.

Hello Chuck,

I'm not from support so I don't have access to your server or the credentials you provided.

I was just checking from the error messages to see what could be a possible cause.

Best regards and good luck in finding a solution.

@chuck you have to make sure that your extensions are compatible with the Joomla 4.

Glad to know that your problem solved.