Could not GET 'https://dl.bintray.com/ekito/koin/org/koin/koin-core/3.0.1/koin-core-3.0.1.pom'. Received status code 403 from server: Forbidden
Disable Gradle 'offline mode' and sync project
Adding this line show error
maven(url = "https://dl.bintray.com/ekito/koin")
You don't need maven(url = "https://dl.bintray.com/ekito/koin") anymore as it's now available on mavenCentral().
Just make sure you are also using the new maven group id which changed from org.koin to io.insert-koin.