Hi Chris, To enable Debug mode in Joomla - as always - please do that:

You can do that also by configuration.php file edition

Hi I can't access the admin I get the same 500 error so I have changed the config file to the above manually. This the debug message:

Fatal error: Declaration of _JchOptimizeVendor\GuzzleHttp\Psr7\Uri::getScheme() must be compatible with Psr\Http\Message\UriInterface::getScheme(): string in /home/yxigzgeo/public_html/administrator/components/com_jchoptimize/lib/vendor/guzzlehttp/psr7/src/Uri.php on line 332 FatalError HTTP 500 Whoops, looks like something went wrong. Compile Error: Declaration of _JchOptimizeVendor\GuzzleHttp\Psr7\Uri::getScheme() must be compatible with Psr\Http\Message\UriInterface::getScheme(): string Symfony\Component\ErrorHandler\Error\ FatalError Show exception properties

Symfony\Component\ErrorHandler\Error\FatalError {#999 ▼ -error: array:4 [▶] }

in /home/yxigzgeo/public_html/administrator/components/com_jchoptimize/lib/vendor/guzzlehttp/psr7/src/Uri.php (line 332)

        $uri->validateState();
        return $uri;
    }
    public function getScheme()
    {
        return $this->scheme;
    }
    public function getAuthority()

Hope this helps. Thanks

same problem here! how to fix without phpmyadmin?

Hi have used PHP Admin and disabled the jch optimize component and plugin and all is now working. Thanks for the help. Regards Chris

If you Joomla Admin don't work anymore (and you're in the panic mode, with no DB skills) - rename those folders:

• administrator/components/com_jchoptimize
• plugins/system/jchoptimize
• plugins/system/jchpagecache

It will allows you to disable all elements from JCH Optimize using Extension Manager.

Notice! I am not a JCH Optimize developer. It's just a friendly tip, not a support answer.

About problem with PHP 8.1 or PHP 8.0 - tomorrow we will share legacy patch.