php-cs-fixer nagging about overidden configuration file

Please try choosing the Custom ruleset at Settings/Preferences | Editor | Inspections | PHP | Quality Tools | PHP CS Fixer and supply the path to the ruleset after clicking the [...] button.

Faced same issue, basically after updating to 2020.3. Custom ruleset already have been chosen. Any other ideas?

I have the same issue after updating to 2020.3, while using a custom ruleset.

In Editor|Inspections|PHP|Quality tools|PHP CS Fixer validation I have set "Ruleset" to "Custom" and set the path to the following ./php_cs file:

$finder = PhpCsFixer\Finder::create()
        ->in(__DIR__)
        ->exclude('var')
    ;

    $config = new PhpCsFixer\Config();
    return $config->setRules([
            '@Symfony' => true,
            'array_syntax' => ['syntax' => 'short'],
            'blank_line_after_opening_tag'                  => false,
            'declare_strict_types'                          => true,
        ])
        ->setFinder($finder)
    ;

I get the following error message:

10:03 AM PHP CS Fixer
PHP CS Fixer: PHP CS Fixer 2.17.2 Desert Beast by Fabien Potencier and Dariusz Ruminski
Runtime: PHP 7.3.5
Loaded config default from "C:/xampp/htdocs/adrexpedite/.php_cs".
Paths from configuration file have been overridden by paths provided as command arguments.
In ConfigurationResolver.php line 359:
[PhpCsFixer\ConfigurationException\InvalidConfigurationException (16)]
Open PHP CS Fixer Inspection Settings

If I change Ruleset to "Symfony" I get this error message:

10:22 AM PHP CS Fixer
PHP CS Fixer: PHP CS Fixer 2.17.2 Desert Beast by Fabien Potencier and Dariusz Ruminski
Runtime: PHP 7.3.5
Loaded config default from "C:\xampp\htdocs\adrexpedite\.php_cs".
Using cache file ".php_cs.cache".
Paths from configuration file have been overridden by paths provided as command arguments.
Open PHP CS Fixer Inspection Settings

I have this issue too

Sorry, apparently I was using a too old PHP CS Fixer version and that is why I couldn't reproduce the issue. The bug is fixed already: https://youtrack.jetbrains.com/issue/WI-57686
You can get it with 2020.3.1 RC: https://blog.jetbrains.com/phpstorm/2020/12/phpstorm-2020-3-1-rc/

Unfortunately it is not fixed for me

(PHP CS Fixer 2.18.3 Remote Void and PhpStorm 2020.3.3 Build #PS-203.7717.64, built on March 16, 2021).

I commented on the issue WI-57686.