The WAI add-on is supported for Enterprise edition.
For Community edition, you can still install it by adding the
Install the WAI add-on with the command: addon install exo-wai-sample.
After installation, to create an accessible site, simply follow steps described in Create a new site. Next, in the Portal Templates tab, select Sample Accessible Website from the templates list:
Set the Portal Name in the Portal Settings tab as "WAI". After finishing creating the site, check it at http://mycompany.com:port/portal/WAI.
Simply use the command: addon uninstall exo-wai-sample.
The uninstallation does not remove the initialized data. If you want to remove the WAI site, follow Deleting a site, Platform User guide.