Message+ error/no notification noise

[AC Question]

Hi I just bought a duraforce pro phone yesterday and I have been have issues with the message+ app. I have a notification noise set for texts but my phone never plays the noise or vibrates? Even when all are set to highest volume. Also, when I got into settings so I can customize the message+ app it gives me the error message, "unfortunately message+ has stopped working" and it boots me out of the app entirely. Please I really need help figuring this out! Only got this new phone because I will be going on a 15 month deployment soon! TIA