I am having an issue migrating control rigs with custom functions from 5.0.3 to 5.1.0. The migrated control rig blueprints cannot be opened and the editor crashes. I believe it may have to do with one of the input pin types within the custom functions. In 5.0.3, I was able to create input pins of type “Item” but in 5.1.0 that option is no longer available. When I remove the “Item” pins or change them to some other type, the rig and functions can be migrated and opened again in 5.1.0.