Confluence migration to cloud error - cannot get space import progress

[NTAM Infrastracture]

Hi guys, I'm getting the following error when migrating from on-prem Confluence to Cloud with migration assistant v3.4 with the progress reaching 80%:

An unexpected error occurred during step: Importing to Confluence Cloud. Error: Error getting space import progress for for taskId: mplus-mpri:file:migration:2fb7fe03-dbb8-40ea-84cd-ef3bbc37917c:075b38d3-fd7b-4f47-8e0d-1c971b7edf2f

The error comes up on every Space, regardless if I try migrating multiple spaces at once, or one by one. Looking at the content in the cloud, I can see that everything seems to migrate OK. I cannot see any outbound traffic from our on-prem Confluence to the Internet that could have been blocked and caused this error either.

Any help would be appreciated. We are scheduled for production migration in a few days.

Cheers,
Andrew

[OIT.test01]

Facing the same issue, any solution? 

[Alex Koxaras -Relational-]

Hi @NTAM Infrastracture 

Did you try contacting atlassian's support for your migration? Usually, moving to production has to be done after you have a successful migration and you can verify data integrity.