Hi all,
I have the following flow. which needs to be expanded as well:

So the flow idea is , after the manual trigger (which at some point will be HTTP request) , I need to List records wich are matching UserID from CDS Contacts entity. Then from this UserID, I need to match and get records again from CDS which will be POs.
Then the responce will be - UserID = X amount of POs.
Currently for list records I am having this error:

Could you please give me some ideas, how this flow can be accomplished and why this error is coming up(researched it already - nothing.)