UAParser\Parser::parse() must be of the type string, null given

[VantianKaq]

Describe the bug
Whenever I try to do anything, including starting the server locally, I get:

In Parser.php line 35:
Argument 1 passed to UAParser\Parser::parse() must be of the type string, null given, called in D
:\Projects*****\vendor\pragmarx\tracker\src\Support\UserAgentParser.php on line 25

Removing the package, obviously, removes the error. But nothing else I have done (reinstall, clear cache, add package to non-discover, etc) has worked.
This literally started overnight with no configuration changes or packages updated, so I'm at a loss as to what to do. Any help would be greatly appreciated.

System

• Laravel: 5.8.*
• antonioribeiro /tracker: 3.5.0

[voicerecordist]

I get the same error
please help

[dikutandi]

I thing There is an issue in the package that needs fixing to be able to work. The error occur when "composer dump-autoload" run. so I edited the pragmarx\tracker\src\Support\UserAgentParser.php and edit the construct method.

here my code

public function __construct($basePath, $userAgent = null)
    {
        $userAgent = $_SERVER['HTTP_USER_AGENT'];
        if (!$userAgent && isset($_SERVER['HTTP_USER_AGENT'])) {
            $userAgent = $_SERVER['HTTP_USER_AGENT'];
        }

        $this->parser = Parser::create()->parse($userAgent);

        $this->userAgent = $this->parser->ua;

        $this->operatingSystem = $this->parser->os;

        $this->device = $this->parser->device;

        $this->basePath = $basePath;

        $this->originalUserAgent = $this->parser->originalUserAgent;
    }

after that i run "composer dump-autoload" my self

[dikutandi]

I thing There is an issue in the package that needs fixing to be able to work. The error occur when "composer dump-autoload" run. so I edited the pragmarx\tracker\src\Support\UserAgentParser.php and edit the construct method.

here my code

public function __construct($basePath, $userAgent = null)
    {
        $userAgent = $_SERVER['HTTP_USER_AGENT'];
        if (!$userAgent && isset($_SERVER['HTTP_USER_AGENT'])) {
            $userAgent = $_SERVER['HTTP_USER_AGENT'];
        }

        $this->parser = Parser::create()->parse($userAgent);

        $this->userAgent = $this->parser->ua;

        $this->operatingSystem = $this->parser->os;

        $this->device = $this->parser->device;

        $this->basePath = $basePath;

        $this->originalUserAgent = $this->parser->originalUserAgent;
    }

after that i run "composer dump-autoload" my self

I change my code into this
$defaultUserAgent = 'Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0';

   ```

if (!$userAgent) {
$userAgent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : $defaultUserAgent;
}

[felixbeer]

So did this happen by a recent update? Cause editing vendor files can't really be more then a temp fix imo 😅

[namal-incubatelabs]

I faced this issue while configuration caching. Thanks @dikutandi

[freddygenicho]

I am still facing the same issue. I have the latest update but the error persists after running
composer dumpautoload

[damonbakker]

Same issue. Just had the package installed on Laravel version 6.0.

[devInteam]

same here. laravel 7

[lucenarenato]

Tambem estou com mesmo problema.
tem que mudar o contructor.

• https://stackoverflow.com/questions/61553676/argument-1-passed-to-uaparser-parserparse-must-be-of-the-type-string-null-g