cURL error 7: Failed to connect to localhost port 443: Connection refused

Hi everyone, I have a problem when I try to upgrade my owncloud instance, I get the following error "cURL error 7: Failed to connect to localhost port 443: Connection refused"
I can not even perform the manual update because my instance is hosted on a shared hosting with aruba :frowning:
Would you have any advice for me?
Thanks in advance