Thanks for the report, @fperizes; welcome to the Speckle community, even on sad terms.
What you describe almost certainly conflicts with another add-on that is compatible with ours in 2024 but not with the other versions and doesn’t support 2024.
Addons all play in a congested sandbox fighting for dependencies, which can have incompatible instructions.
We are working on improving our ability to identify where the conflicts stem from, but for now, if you want to identify which, you can uninstall and reinstall other add-ons until they don’t work.
If you are happy to do this and provide feedback on where the conflict lies, this can help us better target dependencies.