I use Android SDK Manager on my KUbuntu 18.04 workstation. At previous cases all new SDKs were installed as well. Not I try install SDK for API 30 but... just do not see it. At Friday I tried first time - and have got lots of errors in Manager's log. Now log is clean, no errors. But no SDK 30 too. I only see latest SDK Platform Android R Preview. How can I update my apps to API 30 if I cannot install SDK?