Masque was updated and now no longer works with bagnon. Masque has the following to say in their notes "API version increased to 70200.
Masque now overrides Border region's SetVertexColor method. Add-on authors who use custom Border coloring can disable this feature at the group level by setting the group's BorderSVC variable to true prior to adding buttons to the group. Alternatively, they can use the new method __MSQ_SetVertexColor."
No sure if this is the issue but all my bag item borders are green

It does work, but it overrides the buttons' border region colors. In order to fix this, set the Masque group's BorderSVC variable to true prior to adding them to the group.

Until this addressed, I recommend users disable the Bagnon_Facade plug-in.

Actually, just ignore this issue for the moment. I should have put more thought into how it was implemented and as such, will be reverting these changes. Instead, add-ons using action buttons will have to explicitly identify themselves as such during group creation. I apologize for the lapse in judgement and temporary annoyance. :/

This has been addressed in the latest version of Masque. Feel free to close this.