How to debug Shortcuts Automation

I am relatively new to Shortcuts: I have one used routinely on my Mac, and now I would like to do something on iPhone: I would like to share a Wallet transaction data with a web-site (using POST call). To start with, I created a shortcut automation that is supposed to put transaction data in a dictionary and display that dictionary. It sort of works, but I am facing two blocking issues: 1. With one of the two cards I've added to my Wallet, the automation doesn't run at all. I get a notification that "Shortcuts Automation failed. encountered an error: There was a problem running the automation." When I click this notification, it just opens Shortcuts, so I can edit the automation, but I don't see what caused the error. 2. With the second card, the automation runs, but I get seemingly wrong values in my dictionary. E.g. amount is always zero, so I probably use transaction data incorrectly. I wonder: is there any way to: - debug an automation, i.e. being able to step through the automation after I've paid with a Wallet, and see what is happening at each step, including all "variable" values; - enable some sort of log, where I could see what happened when Shortcuts tried to run my automation, including any more detailed error messages? In general, is there a ways to work on more complex automations? Especially with Transactions, which I cannot execute without actually buying something.