I'm new to Kdenlive and ubuntu. I recently updated my OS to 20.04LTS and I also needed a video editing software and had seen great things about Kdenlive. I downloaded the appimage and followed each instruction, but it won't start. I tried installing it via PPA and I kept getting this error in my terminal:

Err:1 http://ca.archive.ubuntu.com/ubuntu focal/universe amd64 libqt5positioning5 amd64 5.12.8+dfsg-0ubuntu1
Connection failed [IP: 2001:67c:1562::18 80]
E: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/poo ... _amd64.deb Connection failed [IP: 2001:67c:1562::18 80]

Can anyone help?