I had the same issues yesterday night too
╭─plutack@talutPC in ~ via v24.6.0 as 🧙 took 1m40s
[🔴] × paru parabolic
error: error sending request for url (https://aur.archlinux.org/rpc): error trying to connect: Connection reset by peer (os error 104): error trying to connect: Connection reset by peer (os error 104): Connection reset by peer (os error 104): Connection reset by peer (os error 104)
issue is resolved