Facility/Equipment entity ribbon uncustomizable

Hi,

I'm trying to customize the "Facility/Equipment" (OOTB entity) ribbon but when I try to open the solution with the RibbonWorkbench I receive the error message "There were no entities in the solution selected. Add at least one entity and try again".

I tried adding another entity X in the solution and the RibbonWorkbench no longer show me the error, but it opens showing me only the entity X.

It seems like the "equipment" standard entity is not customizable by the RibbonWorkbench.

I tried the same on another customer installation and I get the same behavior.

Have you got any idea about this? Or workaround?

Thanks

Simone

PS: I tested it on CRM 365 v8.2 onPremise with both RibbonWorkbench2013 (v2.0.1.3) and RibbonWorkbench2016 (v3.1.177.1): same issue!