That happened to me as well but all I had to do was refresh the page to get to the login to finish setting it up , you may want to do a factory reset and start from the beginning.
Settings may be restored to defaults using the factory reset procedure. This process will restore the device to the initial configuration of the latest installed firmware. Upon performing the factory reset procedure initial setup must be performed, setting the root password and SSID.
To perform a factory reset from a fully booted WiFi Pineapple, hold the RESET button for approximately 7 seconds. The device will then reboot.
Alternatively the factory reset may be performed from the web interface. From the Configuration page, select Factory Reset from the General menu.
Note: data not stored on external media (USB / SD) will be erased during this process.