laravel-mjml Embedding images fails

Often times with email messages we want to embed the images. Seems it is not possible with this package.

The usual syntax is along the lines of:

<img src="{{ $message->embed(public_path('img/some-random-image.png')) }}" />

This fails with an exception tho:

Undefined variable: message

Stack trace:

#0 /home/XX/resources/views/emails/users/XX.blade.php(36): Illuminate\\Foundation\\Bootstrap\\HandleExceptions->handleError(8, 'Undefined varia...', '/home/XX/s...', 36, Array)
#1 /home/XX/vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php(43): include('/home/XX/s...')
#2 /home/XX/vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php(59): Illuminate\\View\\Engines\\PhpEngine->evaluatePath('/home/XX/s...', Array)
#3 /home/XX/vendor/facade/ignition/src/Views/Engines/CompilerEngine.php(36): Illuminate\\View\\Engines\\CompilerEngine->get('/home/XX/r...', Array)
#4 /home/XX/vendor/laravel/framework/src/Illuminate/View/View.php(143): Facade\\Ignition\\Views\\Engines\\CompilerEngine->get('/home/XX/r...', Array)
#5 /home/XX/vendor/laravel/framework/src/Illuminate/View/View.php(126): Illuminate\\View\\View->getContents()
#6 /home/XX/vendor/laravel/framework/src/Illuminate/View/View.php(91): Illuminate\\View\\View->renderContents()
#7 /home/XX/vendor/asahasrabuddhe/laravel-mjml/src/Process/MJML.php(64): Illuminate\\View\\View->render()
#8 /home/XX/vendor/asahasrabuddhe/laravel-mjml/src/Mail/Mailable.php(66): Asahasrabuddhe\\LaravelMJML\\Process\\MJML->renderHTML()
#9 /home/XX/vendor/asahasrabuddhe/laravel-mjml/src/Mail/Mailable.php(41): Asahasrabuddhe\\LaravelMJML\\Mail\\Mailable->buildMjmlView()
#10 /home/XX/vendor/laravel/framework/src/Illuminate/Mail/Mailable.php(153): Asahasrabuddhe\\LaravelMJML\\Mail\\Mailable->buildView()