Problem with the Contao after upgrade 4.13 to 5.3

Hi,

I upgraded my Contao website from 4.13.38 to 5.3.1. Everything was successful, Contao Manager is working okay, but the website is not functioning. The error is logged in var/logs as:

Code:

---

Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"?" at Container.php line 263

{
"exception":
"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"? at /opt/testportal/vendor/symfony/dependency-injection/Container.php:263)"
}
{
"request_uri": "https://testportal/contao/login",
"request_method": "GET"
}

---

Both FE and BE are not working.

What could be the problem here? I searched for solution in Internet, but although there were similar questions, I didn't find real solution.

Beside contao-core, rocksolidthemes plugins are installed in Contao.

Finally,

We solved the problem. In folder config there should be added file services.yaml with following code:

Code:

---

services:
    contao.image.image_sizes:
        class: Contao\CoreBundle\Image\ImageSizes
        public: true
        arguments:
          - '@database_connection'
          - '@event_dispatcher'
          - '@contao.translation.translator

---

This is the same configuration as it is for service contao.image.sizes in core-bundle, but for some reason the system is searching for contao.image.image_sizes. Since that service is not exists, we copied the definition under the name of missing service.

Somewhere I found this code, and there is probably why the system is searching for contao.image.image_sizes

Code:

---

public static function getImageSizes()
    {
        @trigger_error('Using System::getImageSizes() has been deprecated and will no longer work in Contao 5.0. Use the contao.image.image_sizes service instead.', E_USER_DEPRECATED);
        return static::getContainer()->get('contao.image.image_sizes')->getAllOptions();
    }

---