Call to a member function get() on null in message_ui_install()

Problem/Motivation

While trying to install Message and Message UI (both are enabled by core.extension.yml) we get the following error:

Call to a member function get() on null in message_ui_install() (line 23 in message_ui.install)

It seems, the message-view as defined by Message in views.view.message.yml is not imported yet and cannot be loaded at this point.

Proposed resolution

Wait for the configuration to be installed before accessing the view.

Remaining tasks

Create patch (see https://github.com/RoySegall/message_ui/issues/37).