Re: Triggering Power Automate to PowerApps Portal
based on that error, either the item doesn't have a value or you put the wrong field reference in the get record step.
Get record is like a lookup--you choose the entity (where to find the value) and the record id, and it gets the entire record.
So in your original screenshot, you have fd5a7dcf-5bbc........ for the Doctor Name. That is the global unique identifier (GUID) for the Doctor . Assuming doctor is contacts you would do
Get record for contact and specify the Doctor name field for the identifier. This will then get the doctor record based on that ID.
Your latest screenshot doesn't show the definition of what you are passing to the get record step. The error makes me think the value of the field you are passing is KSP-1, which is not a GUID, so you likely have selected the wrong field reference for the identifier for the get records step.
also, be sure to rename your steps, especially get record steps. It gets really confusing if you don't.