Run HomeyScript from Flow on mobile app

Hi all,
In the web app on my Apple laptop I have created a homescript named ABC which runs successfully when I use the test-button.

Next step is in the mobile app where I created a flow including a THEN with the command: execute homeyscript ABC. When this flow is triggered it does not execute script ABC.

Anyone has an idea or suggestion?
Gr. Bert

Does it show a green checkmark next to the Flow card?