D-link DWR-921 router flashing range LED and no internet access

Hello, I have a problem with the above-mentioned router. For half a year, it has been working fine, but since yesterday the orange coverage LED is flashing and the POWER and WLAN LEDs are on. When I connect to the router via wi-fi I get a message saying I can't access the network. Do you know what this may be due to? Thank you in advance for your help.

The number one question is whether you can get to the router from the wifi level.
Two what give the commands ipconfig / all and tracert 8.8.8.8
Does the internet work with a cable?

jakub B. wrote:

Do you know what this may be due to?

Reset it and set it again.

If it doesn't help upload the sofa, if it doesn't help replace the router and I would seriously check it or give it to someone who is overwhelmed by such things