Cannot read properties of undefined (reading 'data')

[bluebird1250]

Very nice viewer!
When selecting "View -> Alll relatives" sometimes the screen turns "blank" and I cannot get back to a proper view..
I then checked in the Debug-console and see this:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'data') at relatives-chart.js:130:126 at y.each (each.js:4:14) at t.layOutAncestorDescendants (relatives-chart.js:122:23) at t.render (relatives-chart.js:270:40) at t.render (simple-api.js:53:26) at e.value (chart.tsx:323:35) at chart.tsx:397:14

react-dom.production.min.js:216 TypeError: Cannot read properties of undefined (reading 'data') at relatives-chart.js:130:126 at y.each (each.js:4:14) at t.layOutAncestorDescendants (relatives-chart.js:122:23) at t.render (relatives-chart.js:270:40) at t.render (simple-api.js:53:26) at e.value (chart.tsx:323:35) at chart.tsx:430:28 at Ru (react-dom.production.min.js:262:359) at e.unstable_runWithPriority (scheduler.production.min.js:18:343) at Hi (react-dom.production.min.js:122:325)

Any ideas how to track this further?

[bluebird1250]

Solved the problem. Some persons where added to families without any parents.