the problem is error 22 pycurl 22

Hello
I have installed a utm karugan free
but I have a message of the error here is message:
https://download.comodo.com/web/korugan/os/x86_64/repodata/repomd.xml : [Errno 14] pycurl ERROR 22 - the requested url returned error : 404 not found"
good to you
rodrigue