Hello awesome community!
I'm trying and learning to create a custom workflow.
After creating all the necessary objects in Visual studio, I went to the workflow set up screen.
Clicked on "New" button, selected my custom workflow, opened the workflow and entered my credentials to log in, and then I started to design the workflow in the workflow designer.
After I finished from the design. I clicked on "save and close" button and I was asked if I want to activate the workflow.
I clicked on "Activate the workflow" and then an error window appeared.
Here is a screenshot of the error screen:

And I'm not sure how to solve this issue...
The workflow design was: START => TASK => APPROVAL => END.
Any advice is appreciated!
Thanks in advance !