Embarcadero released a patch for Delphi 10.3.2:
https://cc.embarcadero.com/item/30886
This patches fixes the backwards-compatibility for runtime-packages. Usually the minor version-updates (like 10.3.1 to 10.3.2) should be binary compatible. This was not the case for this update. Packages built with 10.3.2 were rejected by applications built with 10.3.1 or 10.3.0 - also by Delphi itself. So especially all IDE-addons are affected - if they are compiled with 10.3.2.
I have just updated the "wuppdi Welcome Page" after applying this patch to my Delphi-Installation. Let's cross the fingers and hope for the best. 😉