https://chozabu.net/stuff/ue56Text3Dcrashfix.7z
Fixed version here - the crash was being caused by the log statement on renderer line 40 getting the name of a null parent (at least on my machine, I see there was a different issue mentioned here UE 5.6 Engine Crashing Bug with Text3D - #15 by qipaworld )
(edit: I updated the 7z plugin link above with changes suggested from that other thread)