Couldn't build project with Gradle

[the21st]

Hi! Thanks for sharing this project.

I cloned the repo and ran gradle on my Mac OS machine, and got this:

$ gradle

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/simon/personal/geospatial-messenger/build.gradle.kts' line: 3

* What went wrong:
Plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.2.21'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin:1.2.21')
  Searched in the following repositories:
    Gradle Central Plugin Repository

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 416ms

Any help would be appreciated.