Tested in a fresh all-DE install of cauldron in VirtualBox. When run from a terminal, the following messages are displayed:

[martin@localhost ~]$ mageiawelcome
/usr/share/mageiawelcome/mageiawelcome.py:202: DeprecationWarning: an integer is required (got type float).  Implicit conversion to integers using __int__ is deprecated, and may be removed in a future version of Python.
  view.setGeometry(centerPoint.x() -defaultWidth/2, centerPoint.y() - defaultHeight/2, defaultWidth,defaultHeight)
file:///usr/share/mageiawelcome/mw-ui.qml:928:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Qt Quick Layouts: Detected recursive rearrange. Aborting after two iterations.
Qt Quick Layouts: Detected recursive rearrange. Aborting after two iterations.

dmesg shows:

[  422.931765] python3[3383]: segfault at 18 ip 00007f42c8c7ace7 sp 00007ffc2fb13650 error 4 in libpython3.8.so.1.0[7f42c8bd3000+187000]
[  422.931772] Code: ff e9 08 41 f6 ff e9 7b 42 f6 ff 4d 89 ec e9 be f7 ff ff 41 57 49 89 cf 41 56 41 55 41 54 55 48 89 d5 53 48 89 f3 48 83 ec 18 <4c> 8b 6f 18 4d 85 ed 0f 84 cc 00 00 00 49 39 55 30 0f 85 c2 00 00

This was in a 64-bit system, but I saw the same thing in a 32-bit system.