In the edX course it says to 'create a group', although with the new Power BI updates we now actually need to create an 'app workspace'. When I try to do so I receive the following error (image attached) regardless of what I type into the 'Name the workspace' field - Eg. I've tried 'DAT207xVA' as well as 'Power BI content'. I don't understand why there is any error regarding any issues with 'Missing prefix or suffix'. Any help would be greatly appreciated as I cannot seem to find any answers and figure out what the issue is. Thanks.
I tried with the same name 'DAT207xVA' and it worked for me.
Are you using O365 to access powerbi service?
I think it's expecting you to add some prefix or suffix with the name of app workspace. I am guessing it's dependent on O365 account. Check 'suggested property value' in your screenshot and see if you have similar to that in your O365 account?
No, I have Microsoft office on my computer so I do not have an office 365 account.
I do not see any necessity to have an O365 account to be able to use Power BI.