It keeps reporting session expire, and can't log in from the add-ons page, can log in with the same user name and password on webratio website though.
Do we need special permission? The install buttons on add-ons page on this site is also grey out when logged in.
found the answer:
https://www.webratio.com/forum/question-details/store-problme?link=oln15x.redirect&nav=45