Configuring a connection in integration causes white screen

(Migrated from https://github.com/syndesisio/syndesis/issues/5583)

Author: Martin Muzikar
Assignees: unassigned

This is a...

[pre][code]
[ ] Feature request
[x] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report [!-- Please search GitHub for a similar issue or PR before submitting --]
[ ] Documentation issue or request
[/code][/pre]

Description

When editing an integration and clicking on configure button of some used connection usually displays just white screen to user:

GIF:
!Peek 2019-06-04 14-38