Elsa studio crashes when trying to save a workflow with Httpendpoint and Sum Activity

[TechyGuy99]

elsa-server-and-studio.zip I took the sample from the guides repo attached and added a simple sum activity.

Create a workflow add a HttpEndpoint and connect it to the Sum Activity included.

Hit save to save the workflow. It will crash elsa studio with a 500 error.

THe project was build using the latest available elsa nuget packages.