Question [Q] Voicemail no longer working

I'm running CM11 with 4.4.2 and everything was working great. Today I tried to launch my sprint vvm app and it crashed. Opened it again, crashed. Rebooted, app crashed. So at this point I uninstalled and reinstalled the app and the installation fails.

I've tried every apk I can get my hands on and they all fail the installation.

I'm not sure where to go at this point and I'm hoping someone might have some advice or a fix that can remedy my problem. Thanks in advance for any help you can provide.

edit: Also, I've tried some of the other free voicemail apps but it appears that my calls are not being forwarded by Sprint. None of those free programs are working for me. =/