If you are using system other than Linux, Macos, or Windows x64, you need to provide a JDK 14 or later and run the build directly as described above after using git to update the Skara repository.
If the update command for some reason isn't working or you just want to manually retrace the steps you can each step manually like this:
$ git pull $ bash gradlew
Personal Access Token
Some of the Skara tools requires a personal access token (PAT) to authenticate against an external Git source code hosting provider's API. A personal access token is a like a password that has limited capabilities, it can only be used to successfully authenticate and perform certain limited actions. The following Skara tools requires a personal access token: