First and foremost, welcome to our Community! @kamil.lisek.38226
Thank you for informing us about this issue. I will gladly help you further to resolve this!
Have you already tried rebooting the router? If not, can you please do so, following these steps:
- Disconnect the router and the Media Converter/ONT (the small white or black box) from the power.
- Wait at least 10 seconds. Then connect the Media Converter/ONT to the power again and let it restart for 30 seconds. Then connect the router to the power again.
- Wait until everything has started up completely.
- Check whether the services are working again.
Please let me know if this works, I am here to help you further if needed!