@Gautier Bourgeois - Since some backend debugging/investigation may be required, or questions around your Jira environment that you may not want to share in this public Community forum, I would suggest that you open a Miro support ticket by following these instructions:

https://help.miro.com/hc/en-us/articles/360020185799-How-to-contact-Miro-Support#h_01F010RXA0E1S9C0WFQYX75R6C

In the meantime, however, let’s hope that another Community user can chime in with some insights into the error you are receiving.

Thank you Robert for your help. I’m going to create a ticket.

I noticed from this article that y’all “do not currently support other Jira fields like assignee or date-related fields.” However, the asignee option shows up and is not grayed out. It seems like the app tries to get it to work, but fails to populate the swimlanes with issues. Does this mean that the feature is now supposed to be functional? If not, is there an ETA?