Hey!
congratulations on getting through to the first stage! it can take anywhere from 2 days to 10 days, so give it a little time and try again at the end of the week maybe. Just also make sure that you use the correct combination of information... either UCI + Sponsor name, or file number (starting with F) + applicant name (also - ONLY family name, no first name, initial etc).
Don't worry - if you have the sponsorship approval, ecas will not show much more than just a line saying "decision made" on the sponsorship part, and probably "application received" on the other side (application part).
Good luck with the process,
Sweden