When installing rasa x in linux mint 19, I’m getting this error
“rasa 1.9.3 has requirement prompt-toolkit<3.0,>=2.0, but you’ll have prompt-toolkit 3.0.5 which is incompatible.”
When you get above error just enter this command in command line:
$ sudo apt install prompt-toolkit==2.0.10
That’s it.
Nice workaround around @skjainmiah We are aware of this and will fix it with the next release 
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