Cannot use optional primitives

[NikolayMetchev]

I am trying to use the plugin but I get the following error:

FAILURE: Build failed with an exception.

* What went wrong:
A problem was found with the configuration of task ':services:swift:file-transfer-service:publishFtsUploadTask' (type 'S3Upload').
  - In plugin 'io.jumpco.open.gradle.s3' type 'io.jumpco.open.gradle.s3.S3Upload' property 'batchSize' of type int shouldn't be annotated with @Optional.
    
    Reason: Properties of primitive type cannot be optional.
    
    Possible solutions:
      1. Remove the @Optional annotation.
      2. Use the java.lang.Integer type instead.
    
    Please refer to https://docs.gradle.org/7.5.1/userguide/validation_problems.html#cannot_use_optional_on_primitive_types for more details about this problem.

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