Ok, I see. I inserted my lightning address inside my profile. There is something I am doing wrong.
Discussion
which client are you using?
I am using primal. I am now trying to connect with the Primal Wallet but I can't

Primal needs to activate a wallet to work. But if you use another one like WoS, Coinos, Blink, etc. you can link your lightning address via NWC pasting a string that's usually in the settings of your wallet.
Ok, thanks for your help. I am now using Coinos and I connected my wallet in my account settings. And still I think it is not working. There is something wrong, but I can't figure out what it is.
Did you link it via NWC? Thats in Coinos/settings/Nostr. There you have the string you have to paste in the section wallet in your nostr client.