According to the linked post you’ve provided, it looks like a rep will have to reset your voicemail service. I’ve flagged a rep to help you with this.

Hello! Your voicemail has been reset. Please make sure to power your phone off & on now and keep us posted if the issue persists.

Confirming resetting the voicemail took care of this issue

How do I reset it? Mine is doing the same thing. 

A rep will have to perform the voicemail reset. I’ve flagged a rep to help you with this.

Hello! The voicemail has been reset. Please keep us posted if you need more help and also feel free to check out this link https://www.koodomobile.com/en/help/voicemail?search_api_views_article_search_fulltext=voicemail if you’d like to review the details of the voicemail feature.

Could a rep please reset my voicemail as I also keep getting an error message when I try to access it.  

Hi there, could I have a rep reset my voicemail as well? It was also getting an error messgage and has been for a couple of days.

Hi, could I please have a rep reset my voicemail. It has not worked for over a week, and I keep getting the error message. Thank you @Koodo 

Hello @ktank! I have reset your voicemail, please restart your phone and check this article.

@LynEAW @snh so sorry for the late reply, we’ve just seen your comments. Do you still need assistance with this?

Mine is doing the same thing, can someone reset my voicemail as well?

Hello @Kman777! I’ve just reset your voicemail as well, please restart your phone and check this article to see how you can set up your voicemail again. 

Thank you so much