Level 3 assignment 2 error - Invoke Process workflow: Value cannot be null, Parameter name : Expression

@Aryx wrote:

Hi Devs.

Struggling with this one here.
I wasn’t even changing anything in the process.xaml file and had a successful run.
After it it stops upon reaching process.xaml invoke method.
It says :

Arguments are passed and are not null.

There isn’t even a variable or argument called “expression”.
I tried deleting and adding Invoke workflow again but it hasn’t helped.

Any ideas anyone?

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