Hi-

Your system check results actually look good to me (there is a bit of odd formatting in the Message Board post, but I copy+pasted those into a text editor to view them). I think the only thing you have in the bottom "please fix" section is this:

login shell 'bash', trusting user to translate code examples from 'tcsh'

... which actually isn't a problem that needs fixing, it is just informational about your terminal shell.

I believe you are running the Windows Subsystem Linux; I am going to guess that you get an error message about a "display error" and "0:0"... is that right?
In order to open "afni" or "suma" windows, you need to have a separate x-server installed. We have instructions for that here on the install page-- it is called vcXsrv:
[afni.nimh.nih.gov]
You follow those instructions, and then you just have to remember to *start the vcXsrv every time before opening an Ubuntu session*. I know this seems a bit silly, but that is just the way Windows rolls (and it's only a few clicks-- you just have to say 'yes'/'continue' when starting the Xsrv).

--pt