First, You have to set up the cloudflare-warp repository?s GPG key.
Code:
curl https://pkg.cloudflareclient.com/pubkey.gpg | sudo gpg --yes --dearmor --output /usr/share/keyrings/cloudflare-warp-archive-keyring.gpg
Then add the repository to your machine?s apt sources:
Code:
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/cloudflare-warp-archive-keyring.gpg] https://pkg.cloudflareclient.com/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/cloudflare-client.list
Now try to install it again.
It should solve your problem. Either you could follow the below-mentioned tutorial. Here I described every step with a screenshot.
How To Install And Use Cloudflare Warp On Linux
=> https://previewon.com/install-cloudflare-warp-linux/