I have one site with jce pro 2.9.7 installed. This site does not offer the update to 2.9.9.
Another site has 2.9.8 pro installed and no 2.9.9. is offered in the update page.
Until 2.9.7./2.9.8. updates worked fine. As I saw today, on both sites the update source is missing.
Another site is already updated normally yesterday.