Members help other members with technical questions and problems using Writing.Com!
Yes, Upgraded members can create Folder items. Either route to the page should work.
I just tested it for Chrome, and it works fine.
Your error messages indicate that you've gone over to the old P15 version of the site at some point. For things to work properly, you need to be using the www.writing.com version of the site.
Refering URL: https://p15.writing.com/main/portfolio.php?action=add&status=new&num_type=100
Please make sure you're starting your WDC sessions from a browser bookmark on the www.writing.com version of the site, and not an old link to the P15 version.
Also to clear out any potential browser cache contamination, please:
Log out. Clear browser cache. Shut down all browser windows. Reboot the browser. Log in.
Hope that helps.