Exception trace:
 () at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/Config/Resource/FileResource.php:75
 Symfony\Component\Config\Resource\FileResource->unserialize() at n/a:n/a
 unserialize() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php:99
 Symfony\Component\Config\ResourceCheckerConfigCache->isFresh() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/Config/ConfigCache.php:60
 Symfony\Component\Config\ConfigCache->isFresh() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php:482
 Symfony\Component\HttpKernel\Kernel->initializeContainer() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php:116
 Symfony\Component\HttpKernel\Kernel->boot() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Console/Application.php:68
 Symfony\Bundle\FrameworkBundle\Console\Application->doRun() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/Console/Application.php:122
 Symfony\Component\Console\Application->run() at /h/6vkusovby/htdocs/bin/console:29Symfony\Component\Config\Resource\FileResource->unserialize() at n/a:n/a
 unserialize() at /h/6vkusovby/htdocs/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php:99class User implements UserInterface, \Serializable
{
...
public function serialize()
    {
        return serialize(array(
            $this->id,
            $this->name,
            $this->birthday,
            $this->firstName,
            $this->lastName,
            $this->email,
            $this->phoneCode,
            $this->phoneNumber,
            $this->gender,
            $this->password,
            $this->salt,
            $this->roles,
            $this->newsletter,
            $this->confirmed,
            $this->resetPasswordToken,
            $this->confirmationToken,
            $this->plainPassword,
            $this->comments,
            $this->categories,
            $this->avatar,
            $this->oldPassword,
            $this->kitchens,
            $this->pointsAddedProfile,
            $this->affiliateCode,
            $this->affiliateUser,
            $this->pointsAddedAffiliate,
            $this->orderFrequency,
            $this->averageBill,
            $this->learnedFrom,
            $this->facebookId,
            $this->googleId,
            $this->vkId,
            $this->okId,
            $this->instagramId,
            $this->pointsAddedVk,
            $this->pointsAddedOk,
            $this->registrationIp,
            $this->lastLoginIp,
        ));
    }
/**
     * {@inheritdoc}
     */
    public function unserialize($serialized)
    {
        $data = unserialize($serialized);
        // add a few extra elements in the array to ensure that we have enough keys when unserializing
        // older data which does not include all properties.
        $data = array_merge($data, array_fill(0, 2, null));
        list(
            $this->id,
            $this->name,
            $this->birthday,
            $this->firstName,
            $this->lastName,
            $this->email,
            $this->phoneCode,
            $this->phoneNumber,
            $this->gender,
            $this->password,
            $this->salt,
            $this->roles,
            $this->newsletter,
            $this->confirmed,
            $this->resetPasswordToken,
            $this->confirmationToken,
            $this->plainPassword,
            $this->comments,
            $this->categories,
            $this->avatar,
            $this->oldPassword,
            $this->kitchens,
            $this->pointsAddedProfile,
            $this->affiliateCode,
            $this->affiliateUser,
            $this->pointsAddedAffiliate,
            $this->orderFrequency,
            $this->averageBill,
            $this->learnedFrom,
            $this->facebookId,
            $this->googleId,
            $this->vkId,
            $this->okId,
            $this->instagramId,
            $this->pointsAddedVk,
            $this->pointsAddedOk,
            $this->registrationIp,
            $this->lastLoginIp,
            ) = $data;
    }
...
}
и 
class Restaurant implements UserInterface, \Serializable
{
...

bin/console cache:clear --no-debug
И отпустило )))