Login may sometimes fail if your password contains special characters. Try again after changing the password by removing any special characters.
1) Go to Pinterest settings (https://www.pinterest.com/settings/) and click on "Change your password".
2) In the next screen, change your Pinterest password.
3) Done! - Use the new password you just created to "Connect Your Pinterest" account on Viraltag.
If you still face any issues - don't hesitate to contact us at firstname.lastname@example.org or leave us a message in our in-app chat.