Migrating Widget blueprints and Material Parameter collections

General Issues and Bug Reporting
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1

Reference ID

c56ea922-497b-3f06-a188-9da4e3579327

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Summary

Migrating from one project to other with Widget blueprints and Material Parameter collections makes the editor crash whenever check-in changes or push changes.
You have to recreate all the widgets in order to fix it

Steps to Reproduce

Migrating from one project to another project with Widget blueprints containing an image with a material that contains a Material Parameter collections

Expected Result

Whenever opening this widget, Check-in changes or push changes → UEFN should crash

Observed Result

Recreating all the widget blueprints + all materials from scratch fixes it

Platform(s)

windows

Additional Notes

This never happened before, with the previous update everything was working

2

We’re having this issue now with Widget Blueprints as well. Additionally, some widget blueprints caused validation errors and crashes when trying to launch a session.

I had to remove all the widget blueprints from the project folders manually in order to launch a session.