Why does my board view not work in my next-gen scrum project after restoring JIRA site?

[kevin]

We have "migrated" an old JIRA-site to a new JIRA-site by using the Jira System Restore feature in Settings -> System -> Restore system. It was only one project on the site, and couple of users. Everything seems to work except the board view (aka sprint view). It shows a white infinite loading screen, and an error at the bottom left saying the support has been notified (please see attached image). Although we haven't gotten any info from the support.

Has anyone experienced anything similar?

The new site is on free plan which is why we can't access support.

[kevin · Accepted solution]

Solved!
...by removing the board-feature and re-adding it. In settings->features.