Drone 2.0 - promotion popup error / parameters not being passed

During build promotion there is a red popup with an error, even if the promotion is triggered successfully.
Also parameters added in UI is not being passed to promoted build.

are you running the latest version of Drone? I believe this issue was already fixed per Drone 2.0 error "Cannot read property Number" when promoting build - #4 by bradrydzewski

working, thanks.
it’s not easy to manage having only “latest” tag available for 2.0

We have not tagged an official 2.0 release yet … the latest tag is a preview that is derived from master. We will tag a 2.0 release once we have squashed all of the obvious bugs (see Drone 2.0 available for testing).