If you haven't noticed withdrawal of coins needs to be confirmed through your email. As it is obvious, it's being implemented to add one more security measure to our profiles.
If anyone did not verify his email address, that can be done on profile edit section https://musicoin.org/nav/profile where you need to do the following:
Go to profile edit section https://musicoin.org/nav/profile and click on "Set/change your email or password".
You will be redirected to the page where you need to enter email address and hit "SIGN WITH EMAIL" button.
Then enter your password(at least 10 characters of which one must be upper case, one must be numerical, one must be alphabetical and one must be special character).
Open the email and copy confirmation code, paste it into the corresponding field and hit "CONFIRM" button.
After that, your email will be connected to your Musicoin profile and you will also be able to login using email + password.