Sellers are required to verify email addresses in order to launch new campaigns.
Please click on "here to resend the welcome email" (https://monosnap.com/file/iW0NRT0ydGCw01vEywWuz2bukXOPul) to receive the verification email in your mailbox (check the spam folder as well)
Then follow the instructions (https://monosnap.com/file/iW0NRT0ydGCw01vEywWuz2bukXOPul) to activate your account and you will be able to launch new campaigns again.