Error in adding action in the action button

I have a page that is working on. There are some combinations on it as shown below:

each combination selected on the page upon pressing the Make Payment button will bring them to that page.
ei.:
Pack of 10, Custom Domain, Remove our branding - selection
P10 w/ CD RB page. as shown below:

I already added all the condition except the UM and the rest.

The problem is that, when I add another condition on the “Make Payment” button, it gives me this error:

image

What should I do.

Here is what I am doing: I am trying to close everything, then open again. it will work. but again, if I add another condition, it will give me the same error and repeat the process. I had a feeling that it is not quite right that everytime I will add a condition, I need to restart the app. Doesn’t feel normal.

I hope someone can help me with this.

Thanks