Actually I have a very fast internet but I can't play multiplayer games like Rocket League, Fortnite or Genshin Impact anymore. Discord's voice chat isn't working either.
Maybe the pc is a bit slow, or is only connected via Wi-Fi instead of a lan cable
I also have the problem sometimes, if the Wi-Fi is displayed in the lower right corner, it still doesn't work.
Therefore you have to restart your Wi-Fi or possibly restart your PC.
If nothing works, you have to report it to your Wi-Fi provider.
Your Wi-Fi provider
The WLAN provider is himself.
What does that mean?
can no longer play multiplayer games with it
and
does not work too.
is not an error description. In addition: What does "no longer" mean?
In other words: We don't know anything, but should provide a solution.
It's nice that your router offers fast internet, but your computer can only get an upright connection to the internet via a connection to the router.
If your Wi-Fi or LAN is not configured correctly or the drivers for it are not installed, you can kink your Internet.
You don't write in here how you connected to the internet either. More information please.
If one farmer says to another: "I have planted French fries, I save myself peeling when I harvest them!" 😂😂😂