Build a Powerful Wokflow: Unable to import Mendix SSO and Workflow Commons (Medix Studio Pro 9.1.1)

I am trying to complete the learning path “Build a Powerful Workflow”. I created a new App using Blank Web Template and when I imported Mendix SSO, I got 24 errors. I guess, I would have to go to Studio Pro 9.05, since 9.1.1 is not even available as an option in this forum to select. Nevertheless, since as part of the same problem, it was suggested by Jef Hellemans that if one creates the application in Develope portal and then opens in Studio Pro, it will work. This answer was tried by Samarpita Trivedi and looks like it worked for her. I have tried the same solution, but it doesn’t work for me. So, I am inviting suggestions/solutions/advice. Else, as suggested by Manishkumar Sahu, in the same question, I am going back to 9.05