Keep getting error on visual voicemail

Update: I saved the voicemails I wanted to save by downloading them in between the error messages and then I uninstalled and reinstalled visual voicemail. I had to make sure my vpn was off, and I was on mobile data, not wifi, to activate it. I then imported the saved voicemails successfully. I then closed it, went back to wifi, and made sure to split tunnel the vpn so it would not apply to visual voicemail. So far it appears to be working. I have closed and reopened and listened to voicemails for a bit and I have not gotten the error so far.