Verifier problem updating plugin to 2024.1

I want to update my plugin for IntelliJ IDEA 2024.1. It runs fine locally, but the build on Github fails on the verifier. I get this problem:

Plugin be.sweetmustard.testnurturer:0.1.0 against IC-223.8836.26: 1 compatibility problem
Compatibility problems (1): 
    #Package 'kotlin.enums' is not found
        Package 'kotlin.enums' is not found along with its 2 classes.
        Probably the package 'kotlin.enums' belongs to a library or dependency that is not resolved by the checker.
        It is also possible, however, that this package was actually removed from a dependency causing the detected problems. Access to unresolved classes at runtime may lead to **NoSuchClassError**.
        The following classes of 'kotlin.enums' are not resolved:
          Class kotlin.enums.EnumEntries is referenced in
            be.sweetmustard.testnurturer.GenerateTestMotherAction.SelectionItemType.$ENTRIES : EnumEntries
            be.sweetmustard.testnurturer.GenerateTestMotherAction.SelectionItemType.getEntries() : EnumEntries
          Class kotlin.enums.EnumEntriesKt is referenced in
            be.sweetmustard.testnurturer.GenerateTestMotherAction.SelectionItemType.<clinit>() : void

See https://github.com/sweet-mustard/test-nurturer/pull/46

It is unclear to me how to fix this.