If there are no issues with your network, ie. you can use other internet services then you might be in a region where Capcut is banned. If you are from India then Capcut is banned in your country as it's a Chinese app ( u might know why Chinese apps are banned and the story of TikTok).
But I should say that Capcut is really awesome as a Video editing app, it has lots of features and options.
Hey, don't worry unlike TikTok, you can simply use a VPN and choose countries like Singapore or something then use Capcut just fine.