not able to set up a personal campaign page

I am not able to set up a personal campaign page.

From the civicontribute pg
http://sandbox.civicrm.org/civicrm/contribute?reset=1

• i click the manage contribution pages button

at the manage contribution pages
http://sandbox.civicrm.org/civicrm/admin/contribute?reset=1

• i click the test drive link for edible garden fundraiser

at the edible garden fundraiser page
http://sandbox.civicrm.org/civicrm/contribute/transact?reset=1&action=preview&id=9

• i fill out the form

scrolled down to click continue button

i am brought to this pg
http://sandbox.civicrm.org/civicrm/contribute/transact?_qf_Confirm_display=true&qfKey=a6e382feb935362a13d0d4b05bc3e99f

i click the continue button

at this page
http://sandbox.civicrm.org/civicrm/contribute/transact?_qf_ThankYou_display=true&qfKey=a6e382feb935362a13d0d4b05bc3e99f

i click the create your own fundraising pg

at this page -
http://sandbox.civicrm.org/civicrm/contribute/transact?_qf_ThankYou_display=true&qfKey=a6e382feb935362a13d0d4b05bc3e99f

first name, last name and email are automatically entered.
i correct the email address and then click the continue button

at this page -
http://sandbox.civicrm.org/civicrm/contribute/campaign?_qf_Campaign_display=true&qfKey=896aa5bbe13a1fab32ea2a82f99af3f5

i fill out the setup a personal campaign page - step 2

then scrolled down and clicked save

i got this error
http://sandbox.civicrm.org/civicrm/contribute/campaign