can't install Curl on my UBUNTU 19.04........it seems it can't reach the repository

Hello,

I need curl for HTB, and I can't install in on my desktop.

This is the message:

Code:allen@AK:~$ sudo apt install curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
curl
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 166 kB of archives.
After this operation, 411 kB of additional disk space will be used.
Ign:1 http://us.archive.ubuntu.com/ubuntu disco-updates/main amd64 curl amd64 7.64.0-2ubuntu1.2
Err:1 http://security.ubuntu.com/ubuntu disco-updates/main amd64 curl amd64 7.64.0-2ubuntu1.2
404 Not Found [IP: 91.189.91.39 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/c/curl/curl_7.64.0-2ubuntu1.2_amd64.deb 404 Not Found [IP: 91.189.91.39 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
any advice, please help! I can't find anything online