@Umut.buda 

Good day,

Thank you very much for your time and patience.

For your case, we might need your help to check the following details:

1. How many IOS14 devices do you have and what are they?
2. All other mobile devices, except the IOS14 have no issue at all, right？
3. Since I could also see there is an Archer C3150 under your cloud ID, was the m4 connected behind the C3150, if yes, in which mode, wireless router, or access point?
4. Could you please help me check the IP address and default gateway(if possible, please try to ping the gateway as well) when it said no internet and no websites uploaded?

Thanks a lot.