the importer is experiencing issues. check its status and try again later

Attempting to assist in getting Wunderlist imported to MS To Do and getting the following error:

the importer is experiencing issues. check its status and try again later

When I check the status the website says  that all is fine;

https://todosupport.helpshift.com/a/microsoft-to-do/?p=web&s=wunderlist-help&f=wunderlist-importer-status

Anyone else experiencing issues too?