Any ideas on how to fix this ?
There seems to be an issue with kernel-vanilla repo. I would disable upgrade to 35 and then re-enable if still required.
A proper kernel-vanilla.repo file has no reference to DOCTYPE HTML etc…
Removing the defective kernel-vanilla.repo file on your system will eliminate that error.
sudo rm /etc/yum.repos.d/kernel-vanilla.repo
Unless there is another issue on your system causing a new error the update should proceed.
Thanks this worked!