When the participant submits the registration form, s/he is sent an email with a link to access the THATCamp Gainesville site. However, when s/he click on the link, s/he get the following error message on the website: « You attempted to access the « THATCamp Gainesville 2014 » dashboard, but you do not currently have privileges on this site. If you believe you should be able to access the « THATCamp Gainesville 2014″ dashboard, please contact your network administrator. »

Meanwhile, that person’s registration form is not recorded in the system so the admin for THATCamp Gainesville can’t approve the new registration and give the user access.
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I looked up the general error message, and one post suggested the issue was browser/cache/plugin related, and another suggested going in as network admin(?) to add the user:
premium.wpmudev.org/forums/topic/you-do-not-have-sufficient-permissions-to-access-this-page-1#

wordpress.org/support/topic/you-do-not-currently-have-privileges-on-this-site

Any trouble shooting suggestions are welcome.