Jira is locked for import but no import could be found.

[Boyan Angelov (Nemetschek Bulgaria)]

We are helping a customer to perform migration from Server to Cloud. After a test import was done it seems like it failed and now the instance is locked, giving the following message on every page:

"An error occured during the import process.

Import again with a different backup file or get in touch with our support team. Include the steps you followed, along with any unique characteristics of your Jira setup.

• Jira is locked for import but no import could be found. This is likely to be a temporary issue and should clear up within one minute. If you continue to see this error, please contact support."

It looks like only Atlassian support can unlock the instance to test again, but support ticket cannot be created, because it is Free cloud instance for now. Any way this can be resolved?

[Boyan Angelov (Nemetschek Bulgaria)]

So much about community support for Cloud Free instances...