@dima As far as I worked on the combination and important information Rasa X is designed for a server installation ( means it show Git/Github link only on server installation) Please read the documentation carefully. If you want to install rasa x on server, you can use the following combination which is I’m also using i.e rasa 2.8.11 with rasa x 0.42.5 (I’m using docker installation) Ref: Docker Compose Installation
For Locally: Rasa any version and Rasa X 0.39.3 Ref: Getting error while running rasa x locally - #4 by nik202
I hope this will help you.