Due to Chrome dropping support for JAVA, we've decided to instead embed the official RuneScape Client. This should work for both RuneScape and Oldschool.
Update is now live.
You're free to try this update out by enabling the Staff Update Server. To do this in the SwiftKit Launcher, click 'Options' go to 'Advanced' then 'Use Staff Server'. The password is ruckus13
Please let us know if you have any problems. It's suggested you download the latest version of the RSClient off the RuneScape website.