The cause was the `api-version: ‘26.1’`: older servers reject plugins that declare a newer API. The reported Folia implements 1.21.11. This corresponds to the behavior documented by PaperMC.
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }
