Ok, this is a long shot, but … I set up the build file in a way I can’t currently test against my build targets, BUT obs can. So, I have a 4.0.1.48 build
that might just do the trick. It ‘should’ have calendar add. BUT, only up to 4.0.1.48, I believe. Thereafter I think the libraries are not available but the new ones.
EDIT: Just had a confirmation and tested myself. The obs build will only work till 4.0.1.48. I’m working on the work-a-round.