After the confirm price box appears, in the next dialogue box I checked the box that says ‘prevent from creating any more scripts’…now I do not get any boxes appearing at all when I try to schedule campaigns.

If you encounter the above please log out of your CRM account and re-login and try to send out your email campaign which should resolve this issue. 

Alternatively please use another browser to login with such as Chrome, Firefox or Safari browser and you will find you can send now schedule and send out campaigns.