Angle Plugin doesn't work well after upgrade
After the latest upgrade it's not possible to apply a Mockup if thel layer is grouped or masked.
In the past it was possible.
AdminAsha B C (Software Engineer, Adobe) commented
Thank you for reporting. As mentioned in the link, https://designcode.io/?modal=angleXDInstructions, Angle XD Plugin will not currently support for group selection. You can select the single object in the group then do mockup.
If Mockup was working for group, in which version of XD, it was working ? Currently, which XD version are you using ?